I actually switched to GNU/Linux in college because I wanted to play video games less. This happened right before Proton was released in 2018. Let's just say that I was very unsuccessful in my goal when switching.
Proton is also no complete, perhaps one day it'll be, it's not quite there yet. I've stumbled on some games that don't work (Obscure 1, Resident Evil 0, Dark Messiah, etc) and games that didn't work in the past but now works, with some flaws that are hard to distinguish between Windows' and Linux's fault (Thief: Deadly Shadows).
[1]: https://www.gamingonlinux.com/2023/05/comet-is-an-open-sourc...
However gaming is still very much an excuse. On my Steam Deck I even primarily use Windows after not being able to use Game Pass, issues with Kingdom Hearts, and anything through Epic game launcher being a mixed bag.
Proton is great but it really isn't a silver bullet and you may need to go to Windows if you want to play a specific game.
(Tried Linux on the desktop every year for the previous 20-something, always hit some deal-breaker within a day or so. This time it's looking good.)