This is only speculation but I think some of the accidents (maybe not all), when reholstering is due to feeling like you have to put it back quickly. Maybe there are some legitimate times you need to quickly reholster but it really does put you at risk of some bad things happening. I think I'm a bit paranoid about that part so I always reholster slow and with full attention. That may not be good practice as maybe there are times where I would need to reholster quickly and move or something. I just, at this time, can't even begin to think about doing it that way.