Because the pharmaceutical and insurance companies and anyone who is making a fortune with the current health care system is spending hundreds of millions of dollars on lobbyists, advertising, consultants, and the talking haircuts on the teevee to convince you that any and all regulation is evil socialism. That the so-called "best health care system in the world" is perfect exactly the way it is. And it is, for them. They're printing money by collecting premiums, then dumping their own customers the instant they have to pay out too much in claims.
And the average trailer park genius is falling for it hook, line, and sinker...