I smashed up my wrist in a bike crash, resting it didn't fix shit. When I lifted weights it would tweak out and hurt, so I avoided that for like a year.

Eventually I decided fuck this, and starting lifting weights even though it hurt, then I'd massage it which somehow reduced the pain. Repeat that, and very quickly the wrist fixed itself, zero issues now.

When I broke my collarbone years ago, the docs said just let it heal on its own, which it did just fine(I was hiking/running about 2 hours every day, maybe that helped).