If they didn't have access to healthcare before, it's because the market would not support it (and it's pretty clear why). You can argue that this is a market failure that the government should correct, but if the GOP is concerned about how Obamacare will affect insurance companies (and in turn insurance purchasers), their concerns and "outrage" are quite logical here. If you have too many high-risk insureds purchasing insurance without enough low-risk insureds also purchasing insurance, insurance companies will lose, rather than make money, resulting in, eventually, substantially less people who are insured.
And that's why we have the individual mandate. So it's not just high risk people. But the Republicans think that's tyranny