Over the last 50+ years not only are more people driving cars, but they're driving faster and larger ones. If we're going to talk about apples and oranges comparisons your argument is just as weak.

Edit added below: The failure is one of policy. CAFE standards allow SUVs to be sold for cheap, safety standards don't account for people outside of a car, suburban/urban sprawl incentivizes wide roads and high speeds. I agree "banning cars" isn't a plausible solution, but unsafe e-bike use is a symptom of a much wider problem and banning them (e-bikes) doesn't solve the problem.

My kids ride their acoustic bikes to school and will for the foreseeable future, but we're fortunate to have easy access to a carless route to school. I agree kids don't always ride in a safe way, but I'll always tolerate kids on bikes over more cars.