Individual doctors (or at least the ones I know) are all about simplifying the system and making it easier for people to get basic health care.
Health "Care" corporations (the ones who buy the lobbyists and pundits that we hear about on the news) are against simplifying the system, because if it were more profitable to provide decent health care to everyone, they'd already be doing it.
This isn't a moral judgement, it's just the way large corporations work, and it's why they shouldn't be in charge of providing essential services, at least not without significant safeguards.