Around 10-30% of drivers in the United States don't have car insurance depending on the state.
It really depends on the state on how strict they are with car insurance. My state is very lax and they don't even really check at the DMV. The fine for not having car insurance is also only ~300 bucks and a 90 day license suspension and it only goes up slightly until like the 4-5 time you get caught. It just honestly doesn't make sense to have car insurance with the cost/risk that low. People who pay $50-100 bucks a month for car insurance are morons btw. You can insure yourself for like $30k, and you don't have $30k lying around paying $100 bucks a month is a terrible financial decision.
Insurance in general is a whole racket. Its literally only works due to the fact people on average pay more than they receive. "Oh but what if a bad thing happens" way to live your life, disregarding economics and averages.
Take out a personal loan or save the money you would spend on insurance evry year in a liquid asset (not cash that's almost as bad as insurance). Buying insurance is for npcs.
Only insurance that makes sense to have is insurance that is government subsidized, but that isn't because its better its because you are forced to pay part of its cost with your taxes. Enjoy getting screwed sideways by big government, who literally paya middle man to help ensure their citizens get healthcare instead of directly to the actual healthcare facilities. Insurance offers no service, its a worse scam than banks and credit cards combined.