When I destroyed my shoulder, I found a surgeon that had done a couple of thousands of reconstructive shoulder surgeries. After the surgery he commented that in 20 years and thousands of surgeries, I was tied with one other person for the number of anchors they used. They used eight expensive ($800 each) anchors to re-attach two completely separated tendons. Today I have 100% usage. So, my surgeon is a "rock star". My PT team are also rock-stars.
My SIL had shoulder issues. She worked for Mayo Clinic in Mn. (highly respected, but they didn't believe in PT). She had abraded a tendon. They did surgery. They paid for TWO (yes, only two) PT sessions. Now, 5 or 10 years later she has only about 50% usage of her shoulder. She cannot comb her hair or fasten her bra. So, IMHO, PT would have really helped her.