I agree with John P; it depends on what is meant by "accepting the problem". Additionally, I think it depends on what, specifically, the problem is.
I define a problem as a situation that is other than what one desires. Normally one will try to solve a problem by trying to change the situation such that a more desirable situation is achieved.
Accepting a problem might mean recognizing the fact that one is powerless to change the situation. This might alleviate some of the negative effects (such as mental stress) that are causing the situation to be undesireable, but it might not alleviate all the negatives. (If mental stress is the only negative, I don't think it was much of a problem to begin with. I'm thinking of someone that has a problem with someone else's haircut, or piercings, or some some such thing.) An amputee might see the loss of their body part as the problem, when perhaps it would be better to see it as figuring out how to do things without the body part. If one can get from point A to point B without the use of legs, then in regard to this specific task, the lack of legs is not a problem.