Depends on the kind.
I have worked during my professional career in some hospitals.
Just saying, some hospital cafeteria food is not exactly healthy in the way this writer would like to see. Not sure fast food outlets are providing a worse quality of food than would otherwise be sold there.
The hospital is making some money by leasing space to fast food companies. Should they not do so? Many hospitals are in financial trouble and need all the revenue they can get.
Even without official “Fast Food” chains, plenty of hospitals offer fries, burgers, or even Pizza as an option in the cafeteria anyways.