Going 30 on anything that resembles a bike in geometry and construction is not a leisurely activity one engages in casually. 40 is pushing it, 50 you know is unsafe. 70 is a publicity stunt in a controlled environment. Yes, I know road bikes (with or without electricity) hit high speeds in certain situations, but those situations are away from traffic or potential traffic, a big downhill in the middle of nowhere or a…
It's not reasonable to say "every parent should learn about the dangers of different types of electric vehicle through the injury of a child in their peer group"