When I've been in a hospital cafeteria--it's mostly been because somebody I care about was doing poorly. Usually I wasn't that worried about what I was eating. Comfort food comes to mind here. I don't know that hospital food really affected my overall diet much over time.

If just ten percent of a hospital's food offering is considered "unhealthy"--I'd bet people will make their choices largely from that ten percent. A vending machine full of apples will just gather dust.

We're autonomous beings. Given better information we can start demanding better choices by making them as individuals.