Buying insurance is a decision to pool your individual risk with others and share the costs of that risk. Any individual can choose to maintain their own risk. Earlier today I heard a woman on the radio describe how she was uninsured but working and needed an expensive medical procedure. She said the hospital was happy to set up an affordable payment plan to pay off the bill. I've heard similar statements from hospital administrators. She didn't sound like a freeloader.
What about people who can afford health insurance but not a five-digit bill, and choose not to buy health insurance, knowing that emergency rooms will still treat them anyway if they get in a car wreck?