Most people I know who regularly bike in SF (for commuting at least), have been hit by a car in some capacity. I have no idea why parents use those bike with t

Most people I know who regularly bike in SF (for commuting at least), have been hit by a car in some capacity. I have no idea why parents use those bike with the kids in the back. Why not just use a car? It's not even like those bikes are particularly cheap. The ones I see sell for thousands of dollars.