75k is a pittance compared to the damage you could do to another person's property or life while driving. That's the whole point of the legally mandated liability insurance--for most people getting in an accident that results in injury to the other party would be financially devastating. And even worse would be having someone hit you and put you through 250k of medical care with no ability to pay.

Thousands of people are injured every day in car accidents in the US and about 100 are killed, so its not some kind of unicorn situation.

If you want to argue about driving being a necessity to live and work, that's a completely separate discussion from why liability insurance is necessary.