Obviously we should push for a healthier society, but that doesn't necessarily mean we should shame those who do not have a fit body size.

Don't forget that in many circumstances cooking and hobbies like working out and hiking and such can be privileged.

Someone working two jobs to get by probably doesn't have the funds for a gym membership or to go out hiking, and might not even have the mental energy to.

And then cooking healthy food is surprisingly expensive and time consuming when compared to processed foods.

So yes, absolutely, we should push for a healthier society, but at the same time we should accept that there are valid reasons someone might not be fit, and we shouldn't shame them for that. Instead, we should try to improve the situations that cause it as much as we can within our abilities.