It is a law but rarely enforced, also some places like Washington are primarily digital meaning you update your DL address online but they don’t print a new ID unless you request it or your DL is expired

That's pathetic. It would mean you can't live anywhere without a street address, such as a camp site or a ship. You also can't be a nomad.

So much for "land of the free".

Unless you’re wild camping, campsites have addresses. So do marinas where a ship would need to be docked more or less regularly to establish residency.

As for being a nomad, you don’t need a driver’s license or any kind of ID to wander if you’re willing to sleep rough. If you want to drive on public roadways though, you better have a primary address where the courts can send someone if you kill someone in a traffic accident and bail.

Docking is expensive, so no. It's also only needed once per 5 years or so for maintenance.

Government fining you a ticket doesn't mean your address has to be on the drivers license. They could register the number plate to an SSN for instance.

Did you skip my last sentence? A traffic ticket is not the worst thing you can do in an automobile. And not everyone eligible for a drivers license will have an SSN.

For most situations where you don't have a permanent address, your address is either the place where you receive mail or the courthouse.

And if you don't have a place to receive mail?

Receiving mail is a requirement for participating in the legal system, which is a requirement for citizens.

Laws of the government can't override laws of physics. If you don't have a place where you can receive mail, do they just arrest you or what? Do they assign a PO box to you?

In some places in the U.S. it is (or at least was until recently) illegal to be healthy and unemployed.