I don't think the comment you're responding to is trying to claim that. They're responding to the parent comment asking if there's any way to actually make a Linux anti-cheat method that isn't bypassable and pointing out that this framing isn't really useful because there's no way to make one on any platform that's actually impossible to bypass. Their point isn't about whether it's useful or not to have imperfect anti-cheat but that there's nothing fundamental about Linux that changes the fact that the anti-cheat is going to be imperfect anywhere.