You are confusing the people who you think use ebikes vs the ones who are actually using it. I'm not sure about the future but ebike riders are generally people who would never bike to begin with or who couldn't do the trip ahead of them with a normal bike.
And if a previous bike user switches to ebikes, generally they would have been considering another alternative instead (e.g. Motorbike, car, public transport, etc.)
After spending last week at a house right off the boardwalk in Newport Beach I’d have to disagree here. I probably saw well over a hundred e-bikes zoom by during my stay and would say that most were either teenagers/young adults or people in their 30s to 50s that seemed perfectly capable of riding a standard bike.
And if a previous bike user switches to ebikes, generally they would have been considering another alternative instead (e.g. Motorbike, car, public transport, etc.)