Question: How does the free market regulate systems in which people cannot make free choices, such as healthcare?

When you’re going to the emergency room, you cannot weigh your choices and pick the best option. You’re under duress. I’m all about the fee market, but seems to me that some sectors of the economy, like healthcare cannot be regulated by the free market because people are not free to gather information, compare options, and make an informed choice.

How is this supposed to work?