"Consider that a right or a privilege is property. But also consider that a license issues upon he who undertakes."

What I have found with traffic tickets and the drivers license is, they use the courts and the courts use their own rules. The court rules kills their little FU party. It is not like a doctor. He wouldn't go before a court, he would go in front of a council or agency. And you are correct, the doctor or the commercial driver has agreed to perform. It involves the public safety. Some may say the private traveler effects the public safety, but he not acting by occupation and is not holding himself out for hire, so his license can best be explain for insurance purposes. My insurance company requires it.