But in +100,000km of total riding time I've had very few injuries, just scrapes and bruises because I'm always wearing boots, helmet and gloves as a minimum.
I've high sided on a track twice (too fast into a corner, lost traction, immediately got traction back and flew me several metres in the air). And I've low sided from road debris twice on public roads (once on a round-a-bout at low speed) and private roads (oil slick in a private car park).
I imagine this vehicle for the average person who doesn't ride a lot with the view of safety first would be safer in this than a motorcycle. But I agree with your and the OP's point above yours. An economy budget car would be a safer and equally viable purchase.
Luckily it happened in a city and I was in full leather tracksuit. I got through with a few bruises and ruptured spleen (which thankfully healed on it's own and I now have two of them).
Am I reading your comment right? Your spleen ruptured, healed it's self, now you have two of them?
Apparently this is the current medical consensus in my country- if the spleen is ruptured but not causing massive internal bleeding, the course of action is to monitor patient to see if it heals on it's own. In my case the ruptured part formed scar tissues around it, separating itself from the original spleen.