There is a fundamental flaw in your argument. You don’t earn the right to own the car, nor to drive the car. You can do both of these things without the license. The license allows one to drive a registered vehicle on the public motorways. All cars are hard to hide in public, but many guns can be carried in a concealed way unbeknownst to bystanders.
Also, no thanks. The DMV sucks. Buying my “illegal” guns from that dude who lives in the van is so damn convenient, I don’t think I could give it up.