I'm not sure why a lot of disagreements surrounding this issue devolve in to pointing the finger at some issue that has nothing to do with COVID. I assume it's an attempt to diminish the severity of COVID, by comparing a transmittable disease to one that's not?

To but it simply, I don't risk dying from obesity simply by being in proximity with someone morbidly obese. I risk contracting COVID, and potentially dying by sitting next to someone who has COVID.

What's your thoughts on this?

There have been studies that show group social dynamics can spread (like behavioral viruses), e.g. the behavior traits that lead to obesity do in fact spread due to the conforming nature of humans.

Timescales are, of course, orders of magnitude different, and maybe that is the only difference that “matters”. E.g. we would still rearrange chairs on a slowly sinking titanic because that’s what humans do.