I game almost every single day, and haven't booted Windows in years. In the last 3 years I haven't actually had any game I wanted to play not be able to run in Linux. I've had one that crashed non-stop, but judging by the thousands of complaints from Windows users about the same thing that wasn't a Linux problem.

So yeah, gaming is no excuse, you can game just fine under Linux as long as the devs don't intentionally block Linux like what happened with Destiny 2 (which Bungie just summarily executed so they can dump more cash into the trash fire that is Marathon, RIP Bungie I await the bankruptcy announcement).