You're missing the key distinction which is that obesity is primarily self-destruction but the virus is largely a negative externality (passing it to others, gi

You're missing the key distinction which is that obesity is primarily self-destruction but the virus is largely a negative externality (passing it to others, giving evolution a chance to evolve another strain). If someone has the virus and coughs in my face, that's no better than punching me in the face, which is illegal for good reason. If they eat themselves to death instead, it's no skin off my back (aside from taxes)