Oh I must have got it wrong thenBicycles get you from A to B, but you have to provide all the energy, which makes your legs ache.
Motorcycles get you from A to B, and provide all the energy, so you don't get tired at all
Electric assist bicycles fill the gap in between. By selecting the appropriate system, you can have one anywhere on the scale of proportions of energy supplied from very little to nearly all, so you can choose how much your legs will ache.
Got it now?
Bikes burn fat and save money
motorised vehicles burn money and makes you fat
exit stage left and I will leave you all to it