As an alternative mode of transportation, that could/should replace car usage for many people, I think we need to separate the two completely as well. The throttle version needs to be regulated more like a motorcycle or moped. This would take it out of the hands of most kids and cause license suspension worries for young adults and other reckless users. I agree they are essentially death machines and governments generally have no sane approach to regulating them.
That said, I think the e-moto versions have more potential towards alleviating traffic or being an alternative mode of transportation as most people don’t want to peddle at all. E-bikes are great, but I don’t think it’s reasonable to assume that would ever be on the average Joe’s list of feasible alternatives.
> most people don’t want to peddle at all.
Most people don't want a two-wheeler, period. Otherwise everyone would be riding motorcycles. People want a vehicle that will keep them dry, comfortable, and safe. Two-wheelers of all types fail at all of those things.
> could/should replace car usage for many people
Motorcycles already did that. E-bikes or E-motos do not bring any advantages compared to normal motorbikes, so you shouldn't expect many people to switch.
There is nothing standing in the way of electric motorcycles.
People get e-motos because it is effectively a motorcycle, except it doesn't have any road legality requirements. People treat them like bicycles that can just magically go 50mph.