FWIW, the easiest way to dispel the fallacies pumped out by these individuals is to ask how much time they've sunk into a reasonably contemporary competitive online game. I almost never meet people who have these delusions about anticheat being ineffective that also has actually invested significant (>500) hours into the games that they're appropriate for.
(people who work with spam and fraud/abuse prevention also usually don't have these delusions, because the underlying economics are similar. turns out that actually having experience with a thing is enough to disillusion most people of stupid ideas about that thing, who know?)
All of us refuse kernel level anti cheat.
Dota overwatch is the best we have available for anti cheat. It's better than kernel level anti cheat
If we look at a game like Rust it's impossible for it to exist without a kernel anti-cheat today
Ring 0 anticheat is a mitigation, and just one step down the road of enforcing fairness. The goal of erasing cheaters quickly becomes a Procrustian bed that alienates fair players and funds cheat developers, there's nothing that gamedevs can do client-side to solve this problem without redefining how PC gaming works. Out of all the games I've put 500+hrs into, votekick is the only working anticheat that I've encountered.
Competitive games will likely add AI-based flagging into the mix, but it still doesn’t make sense to make cheating as trivial as adding a few uprobes/kprobes on a Linux box.