There are quite a few e-bikes in the Okanagan and part of that may be a function of topography. E-bikes permit more people to enjoy bikes in their neighbourhoods and bike paths than would do otherwise. I have rented one and enjoyed it for longer distances, using the different power assist settings depending on topography. They are indeed heavy bikes and one is not likely to use zero power assist on anything but flat ground. I think they have a niche place in the market with the major downside being as LTR mentioned. Many folk travel too fast on them, lose control and end up in ER.
From my extensive observation over the years while riding my bicycle (about 3500km/yr) I would say that they shouldn't be allowed on city paths because they're far too fast, and they shouldn't be allowed on city streets because they're far too slow, so there's simply no situation where they can comfortably exist and not be dangerous.
... the "city" of Toronto is "full" of e-bikes where the riders "weave" onto side-walks, parked any/everywhere that fits because its riders are trying to make as "many" and "as fast as possible" Uber/DoorDash/SkiptheDishes/Foods-deliveries.Don't know what the accidental or death rates are involving e-bikes. But ownership/ridership can be reduced by simplying introducing requirements for licensing and insurance on e-bikes.
I forgot to mention I was almost runned over by one on "the side-walk", never mind about the numerous times cut-off the lights' intersection. The back of these bikes usually have a big storage unit or a gigantic tote carried by the rider (which I presumed is for foods).
I won't mention also that the rider had no helmet on, much like plenty of other non-ebikers but then if they want to fight with other motorists on the street, I can't stop them. Just don't kill/maim the pedestrians with legs (ie. not on scooters either) on the side-walks.