"I can see that, if they're all crowded together. Bet they're useful over open country, but I don't know why you'd want one in a city."

Status symbols, maybe. He's canny enough to work that out as a likely reason. Such a vehicle can't be cheap, for they must be hard to build. And like ships, people probably customize them to show them off as a point of personal pride. With one at the helm and several other passengers, there are probably people who pool funds together to buy them and have them designed to their liking, so of course they want to drive them everywhere.

"Nice thing about the sea, there's a lot of open space. Doesn't mean you don't run into other people, of course, or I'd be out of a job, but if you stay out of major trade routes you can have a nice sail without anyone in the way."