Would you recommend the same to fix a person's a broken leg or eyesight problem?
Already said "I know some can't do sports." Also didn't say anything about fixing physical health issues.
My point is not ability to do the sport, is that you're taking mental diseases as different from "physical".
The brain is harder for us to understand than a femur, but that doesnt warrant dismissing its malfunctions. Exercise, good sleep and similar stuff is healthy for everyone, but suggesting healing OCD with that is just as ascientifical as suggesting to tough it out for a broken bone.