There are/were a lot of systems where you need to be granted a privilege in order to do something.
Meaning there’s a law against doing it without said privilege.
“If there isn’t a law against it, you’re allowed to do it”
Even in liberalism, what you said is still the case. I need to be granted the privilege of a driver’s license to drive a car, I need the privilege of a medical license to practice medicine, etc. You’re talking nonsense.
And just as many where the laws aren’t defined so anything can be laid out as illegal