As a commenter below put it so well, all of these responses are "a symptom of how we think about these kinds of problems being badly broken..."
Furthermore, I disagree that something is necessarily better than nothing. Wrong or incomplete advice can be much worse than no advice. Telling somebody it sounds like they have the common cold while missing out on the possibility of tuberculosis because the doc can't do a chest XRay, a PPD (skin test), run cultures, or listen to the lungs, is downright dangerous to that person and the people that they come in contact with. If a doctor then recommends the wrong drug to somebody based on incomplete information, the long term outcome can reduce or end a life.
This is why (1) medicine is already so heavily regulated (2) malpractice is such a prevalent concern among doctors and (3) it would only confuse healthcare consumers to endorse a second tier of medical care where the advice they receive might be "less right" than that of the first tier.
Here are some reasonable parallels to the dilemma you bring up:
- Plenty of people in the US can't afford to buy a car. Is it surely better to let them all buy cheaper used cars from foreign countries with crappy brakes, no seatbelts and no airbags?
- Plenty of people can't afford to buy meat as often as they'd like. Is it surely better to let them buy cheaper meat from unknown sources which hasn't been USDA approved?