Probably depends on the locale. In Europe, riding a moped in a big city is a way to drastically cut your commute compared to driving a car. It's not exactly dangerous when all the other road users are moving at 5m/min, and being able to just skip all the traffic jams is a godsend. By car, my trip to the office was about 45min - it was 15min on a moped, a stop at a shop for some snacks included. And that's with riding speed never exceeding 50km/h.

I had two accidents during my 5 years of commuting, and both times I only got minor scratches and had to replace my shoes. Both happened at speeds a determined bicycle rider could achieve, but I suspect I wouldn't be as well protected on a bicycle (both the machine itself and the protective gear tend to be much lighter there than on a moped). If I needed to do that again, I'd buy a model with two wheels at the front, which would have prevented both accidents - though I'm not sure if added stability wouldn't encourage me to ride faster.

So it's pretty specific, but if you're somewhere where driving culture is not too cutthroat, the roads can support single-track vehicles, and the traffic rather than actual distance is the limiting factor - owning a bike can be an objectively better option.

I'm a motorcyclists. We usually refer to the smaller bikes as "motorbikes". Two wheels in the west is usually a hobby. In other parts of the world it might be a necessity, they don't do it for the pleasure. A lot of people forget this.

And thank God for it.

If every scooter rider in Taipei had a car, the city traffic would move a meter a day.

It's also about convenience, btw, not just cost. It's basically impossible to park a car here. Scooters are also difficult but at least possible.

A huge chunk of people here just take public transit now, as it should be.