Are these people even watching the show?
Honestly? I have to assume not. I think they watch YouTube ""reviews"" of the show instead. At best, I'm sure some of them have it on in the background while they scroll rage bait on their phones.
I think that casual attitude makes sense for someone who has been around for hundred’s of years.
I think it makes sense too, but even if she was only in her 60s... who the hell cares? She gets the job done, she has the respect of her crew, again, who the hell cares? The fact that male characters (who aren't 800 years old mind you) are seldom criticized for doing the same thing should tell you all you need to know.
I see what you mean. When I said "growing as individuals" I meant it moreso as "learning about ones self", i.e.: Kirk is forced to face and overcome his own racism, Spock faces his own biases when he is let down by the betrayal, etc. But yes if we're talking career advancement, then you're right. They're all basically facing retirement except Sulu and Chekov, really.
Personally speaking that doesn't affect the story at all for me, I think it's up there with TWOK as the best Trek film for it's Soviet Union "end of history" allegories.