If the law would be unable to stop or punish you (just as it today can’t stop two unmarried people from living together), then unlicensed drivers would gradually become accepted as a fact.
On the other hand, if in a country people could be punished for living together while not being married, and if most people would agree with such laws, then marriage would be treated more seriously than a driver’s license.
By your analogy, driving a lot without a license will get you recognized by the state as a common-law driver.
If the law would be unable to stop or punish you (just as it today can’t stop two unmarried people from living together), then unlicensed drivers would gradually become accepted as a fact.
On the other hand, if in a country people could be punished for living together while not being married, and if most people would agree with such laws, then marriage would be treated more seriously than a driver’s license.