As a Linux-only person I can totally acknowledge the need for Windows if you want to be a regular player of specific popular games. And maybe VR. I haven't tried it recently after playing a ton of VR a few years ago.

But I can also point out the fact that I probably already own more games than I will ever finish in my adult life, and just in case I do there are also more games released every year that work on Linux that I could ever play. So if a game will not work in Linux even with proton and whatnot, my life is not negatively affected by that game not existing in my world. (I'll admit I probably didn't always think this way, but for a long time I still ran Windows and didn't think about it either way)