If your house is burning, and you call 911, government-paid firemen will come and put out the fire, for free, immediately. They don't ask to see insurance paperwork first or call your insurance company to ask for permission. But if your internal organs are "burning", and you call 911, whichever hospital is closest gets to extort an arbitrary sum of money from you if you're uninsured, because there is no such thing as shopping around for emergency rooms. It's "Pay whatever we want you to pay, or we'll let you die". It's absolutely unconscionable. Even if you are insured, the doctors' ability to do what they need to do to help you is constrained by insurance companies and the profiteering owners of the hospital.

Canada, England, and France have great universal healthcare systems. Every reason for employing firemen by the government applies analogously to employing doctors by the government. Just as fires can spread to engulf a whole city, so can disease. Just as privatization of firemen would lead to mafia-like extortion, so does private healthcare.