I would think cities would want e-bikes to be accessible. I'd be surprised if difference in risk to both riders and those around them as compared to regular pedal bikes is anything other than negligible. But it's an ultra low emissions (assuming a polluting source of power used to charge the battery) with lower infrastructure requirements and maintainance than cars.
This is just speaking for myself, but I bet it's a common sentiment among e-bike owners. I have no interest in bicycling as a hobby or method of exercise. I also own a car. But I do like having a motorized extremely cheap to use means of transportation to use around town, and I often do.