I'm in the camp that believes insurance (even "for profit" insurance) can be a useful thing, but I agree that legally mandated insurance causes perverse incentives.
Wowzers no, that is not the issue here. Some kinds of insurance should be mandated because they protect others. Liability car insurance is the most obvious example. I do not have a right to strap in to my jalopy, careen into oncoming traffic, then shrug and declare bankruptcy.
Health insurance is fundamentally the same because hospitals will provide emergency care to the poor (bankrupting the poor in the process). The costs still get paid, but by the hospital unlucky enough to provide the care, which is *stupid*. It's much more fair if everyone is in a national health care system.
It's more fair, it provides a bargaining position with the out-of-control pharmaceutical companies, and it both reduces costs and improves outcomes by providing preventative care. Preventative care reduces overall costs!! Even for-profit insurance recognizes this, but they still nickle-and-dime us at every opportunity because they prey on the underinformed.
I was uninsured for years and it's only by pure luck that I wasn't bankrupted by a medical emergency. For-profit insurance is fucking vile. Even if we believe in the magical efficiency of the free market, that's a *bad thing* when it comes to health insurance. Perhaps any insurance! In insurance, that efficiency comes from denying valid claims and overcharging people for NECESSITIES.
Edit: I don't mean to go off at you McTraveller, it's the insurance "industry" I'm mad at. To your point though, I do not think I should have the "right" to go without medical insurance. That's literally gambling everything I own against catastrophe.