Ryan's thoughts on the matter are worth reading, and they put some nice context on quotes like this:
So here’s the bottom line: if you currently have decent health insurance, thank the government. It’s true that if you’re young and healthy, with nothing in your medical history that could possibly have raised red flags with corporate accountants, you might have been able to get insurance without government intervention. But time and chance happen to us all, and the only reason you have a reasonable prospect of still having insurance coverage when you need it is the large role the government already plays.
This perspective from Krugman reminds me of a tremendous job market paper from last year. The lead quote is striking, and it sums up the main finding:
Not everyone can purchase insurance. Across a wide set of non-group insurance markets, companies choose to not sell insurance to potential customers with certain observable, often high-risk characteristics.
The rest of the article is great too, and it relates to some previous work by Amy Finkelstein, the economics profession's most recent John Bates Clark Medal winner. Here's an accessible paper of hers on the topic.