The worst injury I have ever gotten from the gym was doing flat barbell bench pressing.. a lot of injuries often occur from Simply genetics and something that people may be predisposed to. My father and my brother had shoulder problems throughout their lives, I myself would have problems as well but I would try to lift through them. By the grace of God I never needed corrective surgery.. it literally has nothing to do with bad form, or elbows flaring, or hand positioning or the path of motion. I'm just genetically predisposed.. during my younger years I always have the attitude of pressing through it, even during days I didn't feel it that doesn't mean I wasn't contributing to further damage. I'm sure some of you guys got some pretty awful stories, but mine is just due to stupidity of resorting to a specific movement that I'm limited to. I do a lot more rehab cables for my shoulder, all Hammer presses and cable movements/machines for my chest, no hyperextending or anything and I have 0 problems..
My injury was not an accident it was stupidity!