TOTALLY disagree, as well as with folks who are saying that "risk is an important part!"
For one thing, there are a series of studies that show that people who are more risk tolerant actually create worse start-ups (for example, [1]). There is at least one meta-analysis that indicates that there's more risk tolerance in entrepreneurs (though the individual studies on that point are contradictory) [2], but OF COURSE there's risk in going off on your own, the biggest one being the opportunity cost of the cushy salary you're foregoing for a year.
No, it's not for everyone. But that doesn't mean that people who start businesses are reckless, and it is HARD to get a good price on health insurance in most states -- and if you get badly sick in the US WITHOUT health insurance, you're screwed (if and when the health insurance reform kicks in, this could change).
I personally refused to quit my job until I knew I'd be able to get health insurance, and it was much harder than I expected despite not having any health problems (as in, I was denied by two providers and had to get the "high risk pool" insurance). So I think it would be effective to reduce the risks of entrepreneurship for people in my situation (i.e., over 35 years old). It's risky enough to begin with; no reason to make it a matter of life-and-death as well.
[1] http://paraplyen.nhh.no/sfiles/85/88/1/file/hvide-panos-2012...