Basically, because the right-wing in this country is completely in the pocket of the insurance companies and they can manipulate a lot of uneducated and sometimes fanatical people into believing the most ridiculous logic. It borders on insanity.
The entire right-wing is in the pockets of the insurance companies? LMAO
The entire right-wing (or close to it) in Congress is. That's more or less what matters, since the right-wing relies on them to set policy.
Just about all of Congress is in their pockets.
Democrats tend to be in the pockets of the trial lawyers moreso, though I must admit that the final outcome of Obamacare seems to suggest that the Democrats love the health insurance industry too.