Huh? Next you're going to be telling me that 23rd century Starfleet officers don't really wear miniskirts and go-go boots.
Let's not get crazy here . . . .
Well, that part isn't a problem, since fashion is often cyclical.
I'm talking about the parallel universe in regards to Trek 09 only. All I am saying is that couldn't those differences be explained because it is a parallel universe?
Depends on what differences you mean. The differences in the design of the
Enterprise? Yeah, sure, because it wasn't built until after the timelines split in 2233. The difference in Chekov's age? Okay, yeah, since he was born after 2233 in both timelines. But not the different appearances of Kirk, Spock, Scotty, Sarek, and Amanda, because they were all born, or at least conceived, before the timelines split (and because we know from Spock Prime's reaction that there
was no in-universe difference in Kirk's or Scott's appearance, just a difference in the real-life actors who were portraying those particular fictional characters). And not the different technology design of the
Kelvin, because it was built before the timelines split.
I know that it's not intended to be, but to me...it would make some sense that it being a parallel universe that there would be some slight changes even physically.
Again, that depends. These things aren't random or magical. You can't just use "parallel universe" as a handwave for any arbitrary difference like the sky being purple, unless you're writing
Futurama. Things happen for reasons. If a timeline diverges into two parallel tracks, then variations in events might occur between those two timelines, but anything that happens in one must be something that
could have happened in the other if circumstances had been a bit different.
And sure, realistically, any difference in the circumstances in which two people conceive a child would probably result in a different sperm-egg combination and produce a genetically different individual, even if they gave the child the same name. But that's not the way it's usually portrayed in
Star Trek, where we've seen numerous iterations of people born centuries after a timeline split still looking identical -- not only played by the same actors in real life, but being able to impersonate each other in the story so we know they're meant to be physically identical. Therefore we must accept the conceit that one of the rules of Trek-universe alternate timelines is that some process is at work that causes the same people to be born in many different timelines. So you can't just say, "Okay, in
this one timeline, that rule that applies everywhere else has suddenly stopped working and the people look different." No. That's just silly and arbitrary.