Good luck with your surgery. A very active tennis playing Principal I worked for when I was teaching had it done and he was back walking the halls in 6 weeks. A while later he was back on the courts so keep the faith. All should,go,well.
As for packing it in it's been discussed here before. If you still like doing it, can perform on a level that makes you and your audiences happy, and most important can get gigs that you like the question answeres itself.
To make a bad pun, let the situation "play itself out" and see what happens.
_________________________
Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer