Yes you are correct cars (4 wheelers) do not come with CBs. The owner of the 4 wheeler has to buy and a CB and have it installed or do it themselves. I should know I drive a 4 wheeler and have one in my car. LOL Cars don't have CBs because a lot of people don't have any idea of how to use them let alone drive them. Only reason I do is because have truckers in my family and friends.
That's why we use CB radio's. If they didn't check their lights well, good luck you should check your lights every time. Don't drive when your headlights are not working. That's being a ####### right there and getting pull by a cop because you didn't check your #### lights. Think truckers I care about you guys unless they are being stupid or being a retard.