The conclusion of the article is a bit ridiculous. tl;dr healthcare isn't a right because we can only spend a finite amount. Yeah, ok, but that dismisses priority entirely. Scarcity is still in play, so you treat the immediate needs first. I think we do have capacity in the healthcare system to do it that way. The author of the article basically bucketed a sprained ankle and a stroke in the same category, and conclud…
I agree the author makes the wrong inferences from the situation, but her points do often go overlooked in the debate: people make a big deal about "omg, someone died because they couldn't afford [more] health care", even though this will always be true, in every system, even the best ones -- you can't save everyone. (Similarly, the rhetoric around "death panels" was toxic made this insight harder to accept.)
The comparison to food is misleading. With food, there's an aligned interest. People go to the store and buy your product. If they aren't satisfied, they buy something else. With health care, most people have few choices. They get whatever plan is assigned by their employer or whatever they can afford within their limited market, often one or two possibilities. Then they go to the hospital, often the only one in the area, which in most cases won't tell them how much it will cost to be treated.
There's no free market, no choice, no aligned interests. The interests of the insurance companies are aligned against them. People are paid to deny as many claims as possible. It often takes years of legal battles to get anything paid out, even when it's legitimate.
Because even preventative care is unpredictably expensive, most people wait to be treated until the problem is most expensive to treat.