In medicine, communicable == infectious. Obesity is not infectious.
You are correct that people's choices depend on what options they have available and their utility function. Some people will eat pie if it is available, and some people prefer (pie, obesity) to (no pie, healthy weight).
You are correct that people's choices depend on what options they have available and their utility function. Some people will eat pie if it is available, and some people prefer (pie, obesity) to (no pie, healthy weight).
How does hindering their choices help anyone?