When I was getting opinions on my shoulder a few years ago, I saw two highly regarded surgeons. One did work for Chicago sports teams, and the other has written several books on shoulder surgery. Went through all the testing, MRIs, office visits etc. All agreed I had a torn rotator cuff. Finally decided on our local guy. I went under, and the next thing I saw was my wife with a huge smile on her face telling me "Great News!!! You didn't have a torn rotator cuff!!"
Turns out, the cushion "stuff" we have in our shoulder was so squashed and messed up, that it acted like a torn cuff (clicking, clunking, pain, little range of motion etc). Dr was able to cut out the offending material and I was only going to be in physical therapy for a very short time. The smashed cushion was obscuring the MRI's image, making it look like a torn cuff.
Also, the physical therapy is very important to your recovery. My mother had RC surgery, was lazy and her shoulder is no better. Others I know did the PT, and are all fine.
Good luck! Hope all goes well!!