People use Linux for a wide variety of reasons and those reasons are very often not ideological. If the only reason to use Linux was ideological, Linux wouldn't be as popular as it is.

linux users like to have fun too

Also, there are plenty of Windows-only games that aren't subject to those practices. Free games, itch.io games, GOG games, etc. There's a big world out there!

It's just a platform which is an available option. Nobody forces you to play games that you don't agree with for any reason.

There are lots of reasons to run Linux. Not everyone who runs it is a free software ideologue.

Stay away from the companies requiring their own game store / "club" (i'm looking at you Rockstar) account and you're likely to be fine.