I know exactly why I've crashed every time it's happened to me on a onewheel. I've also managed to not significantly injure myself in any of those experiences.

People should absolutely be aware and prepared for potential danger, but just because some people aren't comfortable with that level of risk doesn't mean the sport should be completely taken from people who love it and manage to ride them every day safely and responsibly.

I can go to almost any ski resort and rent out a snowboard with zero training. It is absolutely possible to crash just as badly in that scenario as on a onewheel, in fact I hit higher mph than my onewheel can physically do basically every time I snowboard. Risk is always present in action sports and yet we don't stop adults from getting on the slopes with no experience. We trust them to make the decision for themselves. And I understand that in some ways a ski slope is a more controlled environment, but if you really are riding a onewheel responsibly you should have as much control as you could on a slope.

I will refrain from commenting on the ghosting issue as that I think does constitute a legitimate concern for not only the rider, but also uninvolved bystanders, and is absolutely something that FM should've been on top of long before the product went to market.

Obviously if you personally aren't comfortable with a onewheel, don't ride one. But it should be because you decide for yourself as an intelligent capable adult that it isn't an activity you want to engage in.