So we shouldn’t bother trying to teach them how to catch even the most basic, stupid, obvious attempts to manipulate them, then?

I guess we shouldn’t patch security holes in any software, either. Attackers will just spend increasing amounts of effort to find new ones. It’s not worth developing vaccines for any diseases, either. They’ll just adapt. Why lock your car or your house? Determined people can pick the lock, or just break a window.

There is absolutely no benefit to be found in raising the bar so that the stupidest, low-effort attacks no longer work. None at all.