i hope you realize the only reason you can actually game on linux is because valve decided microsoft has to not have a monopoly, because they got spooked by the windows store. i tried gaming on linux in the pre-proton days, it was a hot mess, the advent of proton and dxvk was a massive jump in terms of compatibility. and nowadays valve is ensuring that people do in fact give a shit about proton with the steamdeck, its 1.5-2 million users give a pretty strong reason for devs to keep their games compatible, and anything that runs on a steamdeck runs on linux in general as well.

it doesn't matter whether you run non-steam games through lutris or heroic, you're still running on the translation layers built by valve to keep linux gaming viable