That perspective, that scooters are somehow safer, isn't borne out in the data. In city after city we see mounting injuries and deaths, as usage and popularity increase. Consider https://news.sky.com/story/e-scooter-deaths-triple-this-year... and https://www.timesofisrael.com/in-scooter-crazed-tel-aviv-70-... (light Googling).

If one wishes to take the perspective that licensure helps prevent injuries and death, then apply the licensure requirements to these lighter vehicles too. If one prefers the perspective that all such transport is inherently risky, and thus prioritize personal responsibility and assumption of risk, then let's get rid of the licensure requirements, which will surely help get more people out of their 4-wheelers, with knock-on improvements for the environment, traffic congestion, and parking. My problem is with the arbitrary distinction in the middle.