I agree, although I've made exceptions for a very small number of games with Denuvo (actually, just Hogwarts Legacy, which in hindsight I'm glad I did even though it still hurts my soul a bit) and they can run on Linux (I have nothing else but Linux). It's mostly kernel-level anti-cheat that won't run from what I've read.
If it plays on Linux I don't personally care if its got Denuvo, its isolated by Proton, so not really a big deal. I do think its really pointless, because none of these tools ever truly stop game cheating.