My concerns lie with the 'cosmetic' changes and enhancements.
I don't see anything wrong with cosmetic changes. People have been using artificial means to alter their appearances since prehistory. It's an intrinsic part of human behavior and expression. Heck, personally I get kind of freaked out by body piercings, and I'd never dream of getting a tattoo, but I'm not going to say that my personal discomfort should be binding on anyone else's bodily autonomy, because that would make me a right bastard.
But I don't think you can separate all the various problems from gene enhancement therapy.
And I've said over and over and over again --
everything comes with problems,
and we still do things. The existence of problems is a reason to address and solve those problems, not to avoid using the thing at all.
Right now, the most immediate problem I see with it is it would become something the rich and well to do would use that would further separate themselves from the rest of society, maybe not intentionally.
History says otherwise. The rich don't hoard eyeglasses or laser surgery or hip replacements or cancer treatments. There'd be a hell of a backlash if they tried. Medical care is seen as a universal right. And you claim there's a difference between "necessary" and "optional" enhancements, but will society in the future draw the line in the same place? We already have bionic limbs that are better than the originals, and laser eye surgeries that can enhance vision beyond the baseline. Why would people voluntarily settle for less when they can have those things? They would come to be seen as something everyone had a right to.
But it would happen. And I truly don't believe we've considered all the consequences to make sure, at least as much as possible, that we don't create Khan's...or a society like Brave New World.
Of course we've considered the consequences, and your own examples prove it. We've spent decades and decades exploring all the possible ethical questions of the issue in science fiction, and that's helped shape real-life thinking and debate.
But it's a mistake to think that dystopian fiction is saying "This will happen exactly as depicted." Rather, what's depicted is a cautionary tale for what
not to do, and knowing that helps us avoid those pitfalls and do it the right way. And that means it tends to be simplified or exaggerated from how real life would work, in order to make the point clearer. You can't expect reality to happen the same way. Reality is less dramatic.
What Carey Wilber was warning against in "Space Seed" was not genetic engineering, but
eugenics -- the racist philosophy of human hierarchy that underlaid Nazism. Khan and his people weren't evil because they were gene-modded, but because they were guided by a philosophy that justified domination and conquest. The Augment arc in
Enterprise reinforced this -- Arik Soong determined that the Augments had been engineered specifically to be more aggressive, and that was the real problem. It wasn't
that they were engineered, it was
how.
I don't think we should just blunder into it just because science may advance to that point.
That's a pure straw man. Again -- scientists and ethicists have
already been debating and contemplating these questions for a long time. Nobody is "blundering." Okay, I think I've heard about a guy in China who's been trying to rush into human cloning or engineering or something, but he's disapproved of by the rest of the medical community and hasn't had any notable success anyway. For the most part, the medical community would
of course proceed carefully and weigh safety and ethics
before approving anything for human use, because that's how these things are done.
That's exactly my point. I don't believe we are there yet.
I don't know why you're formulating the question as if it were about the present day. As I said, while we're already well on the way to using human modification and gene editing, the development of more pronounced enhancements will be a gradual process over decades or generations.