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 can't. I've had problems with pains that are demonstrably unrelated to any threat to bodily integrity and for which there is no known technique that removes it. If pain were limited to real threats, I'd agree, but it's not.

So it's not even an issue of "yeah, I get the message, you can stop reminding me"; often times, there is no message to be given, just suffering.