I won't repeat SigMik's excellent line of reasoning and questions. I'll just mention anecdotally that deep tissure work to break up adhesions from a fully healed soft tissue injury has helped regain full function in some of my clients. I don't necessarily "feel" the adhesions, but in my mind, if scar tissue is present and a stress is put through the muscle tissue, there is a chance that the inelastic fibrous tissue will fail causing reinjury. The tissue needs to be broken up and resorbed by the body.