I have been in one commuting accident, plenty of non-commuting accidents though (mountain biking etc.), but you can also fall down stairs while walking or slip up in the rain. We can't be shrinkwrapped everywhere we go. I just picked up my bike, said bummer that hurt, and kept going.
Compare that painful inconvenience to a car accident and it's just silly to call an e-bike dangerous.
I have been in 4 car accidents, and am lucky to be here. You step out from a totalled car, and see the carnage, distress and mess that everyone is now subject to. Traffic has to be redirected, cops show up to take down details of those still alive, EMTs try to find the ways you've been contorted, firemen have to disable the vehicle and clear any fuel and fire risk, the tow trucks scrape the husks of twisted metal off the street so people can use the road again. It's a whole ordeal, and regularly fatal.
Although there are exceptions, usually bike accidents are only fatal when a car was involved. Cars are not safe and never have been, we just accept the risk for the convenience.