Yes almost everybody who uses clipless pedals falls over. And it may be a selection bias (maybe most people do die when they fall, but since they are dead, they never come back to the forum to let us know they died), but I haven't heard of any fatalities because of it.

I'm pretty sure that most bicycle fatalities don't have anything to do with whether or not the rider is clipped in. Given that, everybody who's commuting by bike should just stay home.