Because what sells games is hype

I mean, gamers get exited about latest tech even if they themselves can’t afford it. And of course, there is the high-end gaming market that encompasses millions of users. It’s just that it’s a small part of the overall userbase that plays games.
This is also why I see no point in Apple targeting „gamers“. Gamers (in the narrow sence) are a very particular subculture that is notoriously resistant to change, extremely tribalist, aggressive and not very rational. Gamers are dangerous business.