That's a valid way too. It's just that a lot of people aren't really ready to dive in with both feet from the start. No matter how easy Linux has become or we might think its is. Change is scary and hard. And I think that's a problem that holds back many people yet today.

Its more about having the option. I'd be more comfortable going to linux if I knew that there would be a way to continue using something in a pinch, even if I just need to figure out how to fix it later.

Funny enough my reason for dual booting has nothing to do with anti-cheat I think, rather it's because a couple of my more graphically intensive games will randomly cause my entire system to completely freeze while I'm on linux and they don't on windows. (I also have a couple games that I would need to fiddle with wine to get them to work, but the primary motivation is the system freeze)