yeah, I always need the exercise so no motors for me.
But why do it? I can think of a few reasons:
1: lost the drivers license so they can't legally buy or own a vehicle that needs to be registered.
2: like to tinker. Buying a bolt on kit is cheap and easy to install. You don't have to reinvent what was done over 100 years ago.
3: too lazy to walk.
4: waking is too slow.
5: police tend to ignore the quasi-legality of motorized bicycles.
6: can't afford to own a car, pay for gas, insurance, taxes, storage, repairs, etc.
7: Don't want to have to work to afford the car to get you to work to make money to pay for the car that gets you to work to ....
8: significantly reduces the amount of gas you buy so you significantly reduce the amount of money you are sending to mideast terrorist countries.
9: greatly reduce amount of air pollution. Well on long term basis. Easy to drive a car 15k per year but most motorized bikes probably won't reach 3k per year.
10: Don't want to support the most profitable companies on the planet by buying endless gasoline. Exon, Shell, BP etc.
I owned a moped. It was great for commuting to work when it was 100F out. Cool and relatively sweat free way of getting to work that summer.
I own a vintage motor cycle. It will be going up for sale this spring. Riding a bicycle is easier than wrestling that heavy machine out and getting it to start. The cagers drive me nuts, always tailgating me. Grrrrr. They will just blow by me when I'm on a bicycle but they won't pass a motorcycle. I have mirrors on the motor cycle so I can see them and they are always 10 feet off my rear no matter what the speed is.