If something has that average speed capability, why is not licensed, registered, insured and held accountable as any vehicle would be? My 50cc scooter appears to have comparable speeds (maybe 10kph higher), and I wear proper armour & helmet, took the classes passed the test, am registered, licenses & insured.

That's my massive pet peeve & safety concern: I WANT to love e-Bikes, and all those sorts of things; and like a fellow poster, I've been riding both 500-650cc motorcycles and 50-125cc scooters for more than a decade so 2-wheelers are part of my life; but basically all the ads, shops, and salespeople over here are focusing on "You don't need license, you don't need insurance, you don't need to behave like a vehicle and obey the rules" as their main and primary sales point; and therefore the behaviour of riders is equally nonchalant. In the Toronto area (and it's important to be explicit because this is definitely different in different geographies), the relationship between cars and non-gas two-wheelers is charitably described as "strained" ("murderous/self-righteous hate" may be more accurate), and we all need to get better and understanding how we can co-exist and behave responsibly on the road.