Is it industry lobbying, or is it a jobs program for unskilled workers? How many people are employed pumping gas? What would it do to statewide employment stats if 80% of those people were no longer needed in those jobs?

The argument used to be highway safety; if your tire pressures are correct and your windshield is clean, you're safer on the road. Of course "not self service' is not equal to 'full service' so those things don't happen very often.