Earlier quoted context omitted.
But there is a license for that: a driving license. And the one which is given allows to drive a car with passengers inside. It should be enough...
There's a difference between driving another person from A to B and charging that person. As a comparison you can invite a friend to your house and cook for them. If you start charging people for that there will be food safety regulations etc. you need to comply with.
It's an excellent system that warrants repetition in other industries.
Regulation done right greatly improves one's position soliciting services - I want to know if my driver has had recent accidents, speeding tickets, has poor health, doesn't pass a DBS check, can speak my language (very useful in cities you don't know), that their vehicle is safe.