I agree with having a good helmet, however to be honest my first motorbike ride and car drive at 60kmh were terrifying. Also many people never bicycle even in a 30kmh limites zone because they don’t feel safe.

But I don’t want to downplay speed, as you noted it’s probably the key: most motorbike death are because speed or loose of control without involving any other vehicle. Also small cylinders (< 50cc) are almost absent in the death toll. If suicidal motorbikes with good helmet are allowed, so should be the bicyclists (with good helmet).

Suicidal motorbikes are allowed with license and insurance though. Not saying that's optimal for public safety, but that's a big distinction.

I think that's the logical line between e-bikes an electric motos: at what power or speed do you want to start requiring some kind of licensing or insurance?