Ok, you're being too literal.
There is plenty of food sold for profit that is not a hamburger. Plants are sold as food also.
Basically if you have no money it's hard to find a meal.
But food is a human need. Isn't that evil?
Think of how much it costs to produce a hamburger, compared to the cost of producing plants. And not just the money costs; think of the health costs of eating low quality hamburgers, since they're more affordable for the poor.
Edit:
Also: repair vs. prevention.
Just like with plants, if you create and preserve "more ideal" conditions for a human, you will avoid most of the need for healthcare. The best solution to every problem, is to not allow the problem to occur in the first place. And if it does occur, solving it immediately and thoroughly is next best, while combining that with preventing it from occurring in others. Barring that, treatment is better than neglect.
Correcting the problems at the source... going to the source, to correct the cause of the problems, is the best way. Healthcare is a racket. Charging people for treatment for ailments they only developed due to an environment controlled by the same people who profit from charging more than they can afford for healthcare, seems a bit unethical... perhaps "evil."