Ok Karl

I mean, there are a whole buttload of reasons people are overweight other than mental health issues - I'd wager that the majority aren't caused by stress eating.

Poor food literacy, poor understanding of health, poor access to fresh food and an over abundance of processed/sugary etc foods in the modern Western diet are probably a much larger cause than stress eating.

I do agree with your underlying point, however, that without identifying which of these points is the persons issue and addressing it there is no way they are going to lose weight healthily and consistently

Veganism doesn't require civic action, just not eating animal products. It's literally the same as vegetarianism on a political scale?