I would say your chances of having trouble with fluoroquinolones has to do with if the tendons have been damaged already. I find that generally when I have trouble with something it is where a weakness already existed and what ever it is just decided to take advantage of it.
All I can tell you about rotator cuff surgery is do your PT. Don't slack. Yeah, it will hurt. But I went from not being able to raise my arm beyond chest height to over my head to touch my ear on the opposite side of my head.
Any time the shoulder aches I do my exercises for about a week and they go away. I should do them all the time but what can I say. I am human and fallible.
Seems like half the people I know are having or recently had rotator cuff surgery. I agree about the PT, though I also know that you don’t want to go beyond what the therapist is assigning at any given time. Trying to do too much will only set you back.
It’s entirely possible that the orthopedist won’t recommend surgery for me anyway. The shoulder isn’t as bad as some folks I know, it’s just that it isn’t getting better after around four months now. I’ll find out in a few weeks.