I don’t think knowing this fact should discourage anyone from choosing to be a donor, though. It just means that yeah, it’s unlikely that you’ll be in a position where they can use your organs when you die, but it doesn’t hurt to be put on the list just in case.
Iirc, I think a lot of organ donations end up being from people in motor vehicle accidents.
I did get to see one case where they harvested the person’s bones instead of their organs. Didn’t even know that was a thing. I’m not sure if they died in a hospital setting or not. Might be you get more time to harvest bones as opposed to organs?