There are different kinds of pain, for different reasons and on different levels. The key is to understand it. Learning to recognize pain for what it is and then discovering the root cause of it.
Some pain we can eliminate, some we can manage, some we can't do a whole lot with except live with it (cope).
I see more people use pain as an excuse to not so something. Some people are looking for an excuse and pain gives them one.
I respect the hell out of people that in spite of pain can stand up and smile with a good attitude and not let it stand in their way!
To me this is core lesson in budo and a big part of what we do and why we do what we do in budo!