Swimming Uninjured..Is it possible?

I have been swimming for 50 years and have had 3 swim injuries. I know of some great, great swimmers who have been doing the same and remain untouched. How do they do this? If it is because their greatness is due to technique, they sure need to share. But I also wonder if it is because they swim smart, train smart, know their limitations and train accordingly. Do they listen to their bodies first and train second? Something many people don't do, me included in the past. I've watched Laura Val (The Machine) and heard of Susan Heim Brown. I am amazed. Is it also stroke related?. I know I swam only backstroke for 40 years and voila, 1993 rotator cuff surgery; 1995 impingement surgery; 1996 torn SI joint (sigh). And I learned technique very early on by world class coaches and swimmers; we did all the right things and were doing hip rotation back in the 60s before a lot of swimming folks were doing it. Any thoughts on how this comes to be for some and not others? Donna