possible for their anticheat to work (it isn't)
Except it is. Valorant is a competitive shooter that rarely gets plagued by cheaters. Unlike Counter Strike, were cheats were even used during actual professional matches, Valorant is mostly free of cheating scandals. Every once in a while a new cheat manages to work for a week before being entirely bust. Valorant uses extremely deep anticheat that could even access higher privileges than TrustedInstaller on Windows.
Counter Strike uses Valve's regular old VAC that lives below administrator priveleges, and it's got cheats.
Escape from Tarkov uses regular anticheat software and is so plagued by cheating issues that the community imploded a few months ago when a YouTuber showed just how many cheaters are there per match.
So yes, aggressive anticheats can work and do work. You can be opposed to them, that's totally fair, but you can't make up random claims like "they can't work".