What they don't seem to realize is that these requirements – called "guaranteed issue" and "community rating" by insurance professionals – are actually jeopardizing access to quality health care for these individuals.
Before Obamacare's enactment, employer sponsored group health plans, Medicaid and Medicare already covered people with pre-existing conditions. And insurance bought in the individual market was "guaranteed renewable," meaning a person couldn't be dropped or see premiums go up if they suddenly developed a costly condition, as long as they maintained continuous coverage with that insurance company. (This was already worked into the price of the insurance.) So only a small segment of the individual insurance population was faced with the terrible problem of being unable to afford – or even purchase – health insurance because of a costly pre-existing condition. Some estimate that less than a million people have this problem.
But Obamacare made those solutions irrelevant and unavailable.