That's what I was thinking why have surgery if you have full range of movement, 
Mind I'm not a expert on shoulder surgery. 
I'd say its a wise decision to seek out a 2nd opinion.
Injuries nothing worse & as we age we're more prone to them 🤷🏻♂️
I had a Gall Bladder problem once years ago.....it was bad/disgusting, but it was only this one  time  thing.
The ER doc suggested that I see a surgeon,so I went to see this broad who prefaced her  statement with:
It`s probably nothing, but I think we should remove your Gall Bladder !!!!!!!!
I immediately walked out....if it was nothing,why in the fuck would I let you cut me up 

It`s like Nat says above,surgeons get paid huge coin.........she wasn`t buying a bigger boat on my fucking dime.
Never had a problem with my Gall Bladder again......of course it`s gone now along with a few other parts but fuck her.