People might need car to go buy food, get medicine, go to a hospital, take another person to a hospital, take medicine to another person, take food to another person, etc. Some of those things could mean life or death. People need cars in America, it's pretty hard to live without them.
Transportation is a necessary business. Drugstores, food, hardware and most places anywhere that sells firearms and/or ammo have been deemed necessary. If you want to question something, I would question the guns, but militia rights I guess.
Auto repair/maintenance is probably one of the more essential services to some degree. 3-4 weeks into this thing I don't think shopping for cars is really necessary anymore. Same with guns and ammo, people had a lifetime before the outbreak and a few weeks after to stock up on guns and ammo. It's not like guns and ammo are fresh produce being grown on farms with expiration dates. I'm not too upset if gun shops stay open or not but if the NRA wins even one of those lawsuits it further proves how broken our interpretation of the constitution is.
There's an outdoor mall near me, kind of a high end touristy place. Every store has been closed for 3+ weeks now and half of the restaurants. There's a one man pretzel stand operating in the middle of the empty town square style plaza. It's very apocalyptic seeing the one dude in there selling pretzels to almost nobody in an empty outdoor mall. Glad he has a job I guess. He's working by himself behind a glass window.