Electric Bikes

That doesn't add up the way you think it does. An e-bike is still exercise. In fact, it's pretty good exercise because for general health, time spent doing physical work means more than the actual exertion level of that exercise. For body building, you do need high intensity, but not for general health.

What it adds up to is that e-bike riders tend to get more exercise because the motor lets them go longer distances. What you end up with is transportation and exercise being done together, and the extra calories don't need to be spent on separate exercise time.

There are countless situations in which you can ride too much, or your cargo/baby passengers are too heavy, or the roads are very polluted and that extra breathing on that particular climb is better avoided...et cetera

Have you tried an ebike? My favorite bicycle is a 1980s road bike which weighs maybe 8kgs, but I know what it means to commute every single day more than 30kms with it, it stops being fun after a few weeks. My second favorite is my ebike.

Following your line of thinking we shouldn't have lifts because people need the exercise. Do you know that a single flight of stairs with a lift uses as much energy as roughly 10km with an ebike/escooter? But you don't see me or anyone else attacking lifts/elevators. Also to remember, the lithium mined or refined to make the battery, can be reused forever.