This is how a lot of ideas get nonsensical holes put in them.

There would be licenses, regulations, threat of lawsuit, qualifications and all sorts of other mandatory requirements. If someone wants to be cynical then, yes, a lot of these safeguards would not be put in place until after a certain number of deaths had been exceeded. eg seat belts, air bags, traffic lights, speed limits, road rules in general.

The idea is still viable.

> There would be licenses, regulations, threat of lawsuit, qualifications and all sorts of other mandatory requirements

These already exist in Taxis, and have you ever been in a Taxi? Their drivers aren't exactly the pinnacle of driving excellence.