Garden variety inflammation with some minor tearing, exacerbated by weakness/instability.

Strengthening with PT kept the joint stable enough to stop rubbing and allow the inflammation to clear.

And as long as I stick to a regular gym routine that includes rotator cuff work, it doesn’t recur (and did the few times I lapsed).

But absolutely, PT doesn’t fix everything. Bit for a lot of things, it’s worth trying - but it might also means a lifetime of altered habits to keep whatever injury/problem from recurring.