There’s a cooldown on replies!
An anecdote of one game isn’t proof that they don’t help - you’re not comparing it against a game that kept user mode AC to see what the impact was there. The fact that vanguard “cratered” the cheats for a while shows it’s effective, right? The actual goal isn’t 0 cheats (that’s impossible), it’s keep pushing back the cheaters.
at the end of the way it was temporary and cheating is now stealthier, better and pushed the global community to innovate causing problems for other games that now have to deal with highly sophisticated cheats.