It depends.
If you're an athlete, fair enough. to make it to the top you need your muscles to suffer.
But as a learner? Different story. Pain, in the form of feeling bad about our mistakes, just gets in the way.
Do you believe that the best leaders are born, not made? What about musicians, artists, mathematicians?
Do you believe that there are only talented people and people with no potential to be stars? That's a fixed mindset.
If we think of ability as fixed, we discourage learning, practice and resilience. Could you be doing the same to yourself?