The way I think about it is that there is a benefit in feeling that the pain is a unit of effort. More turmoil you get, more it feels like you are getting things done. That addiction to adrenalin rush is what probably gets things done for me. But I am puzzled by the statement, “If it hurts, you’re probably doing it wrong.“
https://www.lesswrong.com/posts/bx3gkHJehRCYZAF3r/pain-is-not-the-unit-of-effort