Why aren't we all driving boats?

While I was watching my nephew I saw an arcade game that featured boat races through the heart of metropolitan areas around the world.

What dawned on me was that boats don’t use tires! They don’t use roads that need to be improved and are costly to repair. They don’t have brakes that need to be upkept. If you need a new engine it’s really not to much to just bolt on a new outboard motor.

So is it time to flood the interstates?