Is $$$ not an advantage? Motorbikes are at least triple the price AIUI, not to mention more regulated. The main advantage of an ebike is that it's basically a pushbike (in terms of cost) but it lets you be lazy and unfit while still using it successfully as if you were fit.

Yes, there's a few extra hundred bucks in cost, and there's an electricity bill for charging it, but frankly that's nothing. You can buy an ebike for 3 digits, and you could include the power bill in that figure and not notice.