As many as it would prevent or make less serious? There are precious few times more power will get you out of trouble but plenty where too much will get you into it.It would cause accidents.
I can think of one situation where I was driving where more speed got me out of trouble. I was only in that situation because I was going too fast for the situation in the first place. If I'd known I was limited to 70 I wouldn't have tried to overtake in the first place. Happily no one got hurt and I've learnt from it, but it's nothing compared to the number of times I've had to stamp on the brakes to avoid someone doing something stupid.