Slop,
Let me tell you about 2 issues that have happened to me in the past 30+ years and both times physicians told me that I'd never use my right arm/shoulder again.
At 19 in Vietnam 1968 I took an AK-47 round to my right bicep..clean thru and hit the stock of my M-16 otherwise I'd be KIA right now. Anyway luckily it only semi-fractured bone. Dr.s said after re-hab I'd never be able to throw baseball, bowl, etc. I proved them wrong and played baseball, fastpitch softball and other sports.
2nd incident..fast forward to 1995. I used to be a hardwood logger.....long story short large branch came out of a tree when I was felling it and hit my right shoulder driving me to the ground and broke my chromium...I still look off kilter chromium sticks up kinda funny <NFL lineman get this kind of injury often from years of blocking>..Doc said you're done. Not yet Sir I am still bowling right handed and do decently although that year I bowled left handed w/ 14 lb urethane.
Sooooo, my point is it may look bleak right now but don't give up....... get different opinions and work with some great therapists and we will pray for your recovery all is not lost....you may just not have that high backswing anymore.
Chin up you always wanted to be a Wrongsider!

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Scott