This is literally car insurance in the United States. You buy insurance, put money up front for your own health, or risk paying a penality. It's also literally the ACA.
> If let health insurance companies do this, then yes, healthcare would get substantially more expensive for very risky/unhealthy people.
Unaffordable. My mother in law died from cancer recently. Coverage was impossible before; in America's free market that constantly pays out dividends. The ACA was the first time any insurance was affordable.
I'm sorry, but the views you've put forth appear to diminish the plight of others who aren't young and healthy. Those views and policies would kill my friend afflicted with an autoimmune disorder.
_Edit: spelling_