There are literal linux operating systems made specifically optimized for gaming, every single game that support Linux natively and almost every other game that works under proton works better on linux than on windows, also supporting linux is way easier than supporting macos, for linux they just need to make a loader that injects in linux, for macos they need to pay apple to even be able code it, and then they have to make the client support a whole another cpu architecture, its just not happening, there is a reason no client have been made to be injectable in macos, while clients that support linux are already quite a bit