Why isn't Health Insurance a Legal requirement for all U.S. Citizens?

Like it already is in many countries?

If you drive a car you MUST have car insurance because it is required by law in case you have an accident.

Why isn't it a law that everyone must have health insurance because if you don't you can't earn money to pay taxes and often instead will just die.

So, it is in the financial interests of the government that you have health insurance so you can pay taxes as a U.S. citizen.

So, why isn't it a legal requirement like in many democracies that everyone has Health Insurance?