Cars are heavily regulated, but pretty much anyone can drive them, no matter how incompetent.
You don’t have driving tests to determine competency? You don’t have driving licenses that the courts can revoke due to mental incompetence, physical disability, or dangerous behaviour?
We have all of those things. It’s just that the driving tests people take are often said to be too easy.
https://en.m.wikipedia.org/wiki/Driver's_licenses_in_the_United_States