It's so interesting that nowadays we have to add disclaimers for EVERYTHING we say. I honestly took your comment as completely genuine
I do use turbo frequently, and I thought this was the case (players stamina being low), but I've been paying very close attention to my stamina as of late to test that very theory, but my players get hurt in the very early stages of the game (with 99 fitness), so I don't think this is the case.
It's crazy that you haven't experienced one of these terrible injuries! I hope you never do. It's nerve-racking.