Personally, I don't mind pain being a strong enough warning that it's hard to ignore. I can see the need for that. I think the problem with pain is that it's like those stupid car alarms. You know the ones that should be programmed to turn off after five minutes because any good they might do will have been done by then if it's to be done at all, but they actually keep going all night? That's what pain should have: a way of saying, after some appropriate enforced time delay, fine, I've got the message, I'm doing everything I can about the problem, you can stop now.

Have you never been tempted to push ahead doing something you want, and ignored a minor pain? We'd just ignore pop-up boxes if we were in the middle of something we considered important.