For what it's worth (and I know this isn't the consensus view here), some of us hold that both prohibiting smoking at a private space and prohibiting direct donations of food to a person are outside the government's legitimate purview.
However, for my part, I also surmise that in both cases the outcome is undesirable, so I suppose I'm still vulnerable to the point you make in your edit.
Which government? City? County? State? Federal? Is this a legal understanding of the government's purview or a philosophical one? Can public concerns ever override private ones? When? What is people are making morally-correct decisions with clear negative outcomes?
I don't actually expect answers. I just want to reveal some of the depth of issues such as these mentioned.
However, for my part, I also surmise that in both cases the outcome is undesirable, so I suppose I'm still vulnerable to the point you make in your edit.