Given that we have precisely no evidence that wormholes exist, I would still qualify the transportation system as "fanciful."
That's not how science works. Everything is connected. Things don't exist in isolation. The equations that define wormholes are simply one solution to the equations of General Relativity, the same equations that define and govern
every gravitational phenomenon in the universe. And General Relativity is one of the most solidly verified theories in all of physics. Literally every prediction of General Relativity except one (the existence of gravity waves) has been experimentally verified. We know that GR is an accurate, truthful description of the way the universe works. So while we have no experimental or observational verification that wormholes exist, we know that they
could exist, and we can calculate and predict how one would behave if we ever found or made one.
That's the beauty of science. It's not limited to what you've observed. The whole point of a theory is to let you make informed predictions beyond the available data, to go beyond just cataloguing the universe and actually codify the underlying rules that tie all your observations together. To say that anything we haven't directly observed is outside of science is to demonstrate a fundamental incomprehension of what science even
is.
And there's certainly no requirement that a story must limit itself only to things that have actually been observed to qualify as hard science fiction. That makes no sense at all, because just about
all science fiction is about postulating things that haven't been observed or created in reality. Hard SF is SF that accurately reflects scientific
theory as it stands at the time the work is created. It's not about things that
do exist, it's about things that plausibly
could exist. For example, a hard-SF work about aliens would be one whose aliens plausibly reflect the known laws of biology, physics, evolution, thermodynamics, etc., whose anatomy and sociology are consistent with their environment, whose planetary environment is based on plausible astrophysics and exoplanetology, etc. You don't have to have firsthand observations of the aliens in question before you can call it hard SF. You just have to create aliens that could believably exist in the environment you've postulated.
All of which draws from SF conventions and has no bearing on reality.
That's completely wrong. It's not an SF convention, it's the best judgment of astrobiologists and other scientists. Hell, it's simple statistics. The galaxy is 13 billion years old, while human civilization is a paltry few thousand years old. From that alone, it should be obvious that the odds of any alien civilization being within mere centuries of our level of development are astronomically low.
In fact, you even came out and said it: we have no idea what a real alien intelligence would be like, so we have to make it up out of whole cloth.
That is not at all what I said. You're twisting my words to support your preconceptions. You're also reducing the issue to something pointlessly absolute: either we know it for a fact or it's pure fantasy. That's a totally useless standard here. We're talking about
speculative fiction here, so certainty is not even on the table. The issue is one of
plausibility, of how reasonable and likely a conjecture is. It's a relative standard, not an absolute one. Based on our best understanding of the universe, based on available theory and logic, it is
more probable that any given alien civilization would be separated from us by millions of years than that it would be on exactly our level give or take a few paltry centuries.
Don't shoot the messenger. I'd love to see more accuracy in Hollywood SF, too, but let's face it: movies aren't made for us. They're made for the vast moviegoing public.
No one is interested in satisfying us because there aren't enough of us to matter.
As I've already demonstrated, that is simply an untrue statement on both points.
That's just how it is. Most people don't care about science beyond what they learned in high school, and that ain't much.
Which is exactly why it's a good thing that both filmmakers and scientists are trying to collaborate more closely in order to change that. Again, you're making a mistake by reducing the question to black-and-white absolutes. Most of reality can always be found in the middle ground. Yes, studios are in the business of making profit and appealing to the largest possible audience, but that isn't incompatible with trying to portray science more accurately and trying to promote education and understanding. It is possible to do both. Look at
Numb3rs. That's a show that's always made a serious effort to depict mathematics and scholarship in an accurate way, and it's been quite a successful show overall (it's been cancelled now, but it ran for six seasons, which is definitely a successful run). Most audiences may not notice or care too much whether the science is right, but that doesn't mean they'll run away if it is right.
I still think you are overselling how many people actually care about scientific accuracy, though. I mean, there is nothing scientifically accurate about the Iron Man movies, and those make hundreds of millions of dollars!
Actually the makers of
Iron Man consulted with the SEE on some of their technology. Again, you need to look at this in relative rather than all-or-nothing terms. There's always going to be poetic license, but there's a difference between conscious poetic license and just not bothering to try. There's always room to slip in some good science and engineering even in a story that takes dramatic liberties where necessary.
And you don't need that many people to care. You just need enough dedicated people to recognize it as something worth pursuing and to make an effort to pursue it. And that's actually happening now. As Margaret Mead said, "Never underestimate the power of a few committed people to change the world. In fact, it is the only thing that ever has."
You can also look at Avatar, which grossed an incredible amount of money, and SF elements in it are pretty soft. (I am excluding the tie-in materials like books, and taking only the movie as presented, since only a tiny fraction of those who saw Avatar would even be aware of the tie-in materials, much less have read them.)
Which doesn't disprove my point in the slightest. It proves that viewers don't need scientific accuracy, but that in no way suggests that they would reject it. Indeed, I gather a lot about
Avatar, at least where the technology designs are concerned, is very realistic. For instance, there's no FTL propulsion, but a sublight ship that takes a reasonable amount of time to get to Alpha Centauri. Again, it's wrong to define it as all-or-nothing.
Avatar has both good science and bad in it, and the good science didn't drive a single viewer away. Indeed, a lot of people have complained about the bad science, but I haven't heard anyone complaining about the good science intruding on their fantasy movie. And as I said, the Internet lets such complaints be heard much more widely, and that bad press gives studios an incentive to change.