They're just misinformed. The US health care industry is among those most heavily enmeshed with government at all levels (regulation, gatekeeping employment, funding/subsidizing, etc.). Whether you think it's good or not, most everyone would agree that level of involvement would result in a heavy distortion from what the free market would provide on its own.
One rhetorical approach might be to say that since this is already the case, let's acknowledge that reality, then decide whether to increase/decrease/alter that reality.
One rhetorical approach might be to say that since this is already the case, let's acknowledge that reality, then decide whether to increase/decrease/alter that reality.