Is requiring teamwork a form of discrimination against creative people?

I think the world is just getting obsessed about discrimination.

A company requiring you to be decent with your fellow coworkers is not discriminating against you.

On the long term, even if you are the most creative person at your company. If you don’t share your knowledge, get recent hires up to speed by sharing knowledge, you are less valuable.

I don’t think it would je necessary to specify it but, our jobs (be it developer, graphic designers, QA, etc) are already fairly individual and introverted job where asynchronous communication is pretty much the norm for the most part. It’s not like you have to spend 80% of your time talking and interacting.

There are direct answers to your question. I'm going to limit my reply to an indirect, but more important answer:

You don't have to be an asshole to be creative

edit: To be perfectly clear, I'm not accusing or disparaging the poster. I'm stating a general principle

Back in the 1960s Marvel comics put together very high performing and creative 4 person teams to make comic books. That's the real origin story of "Spider-Man", "The Hulk", etc.

Retrospectively Jack Kirby thought it wasn't very fair that Stan Lee hogged the credit but if you look at books that Kirby did by himself like

https://en.wikipedia.org/wiki/OMAC_(Buddy_Blank)

you'd see that Kirby was great at drawing and scenarios but he was nowhere near as good at Lee at wordsmithing.