What if all the streets were rivers? What would be different?

If all the streets were rivers there would be a lot of flooding. Everyone would drive boats instead of cars, and I would cost a lot more to fill your tank in a boat than a car. People wouldn't walk across the street they would swim across the rivers. Cars would never exists which means no more drunk driving. Then again I'm sure people would drive their boats drunk. There would be a lot more accidents because if you had to slow down it would take a lot longer and by the time you did something bad already happened. People would have less money because boats usually cost more than a car. Everyone would have their boating license. There would be a boating theory class instead of driving theory. In the winter time it would be hard to get from place to place because the rivers would freeze up. It would be very humid and a lot of mosquitoes.