I think there are so many factors involved in good health - including our mental attitude, stress level, environmental pollution and the list goes on.
I think greens are being promoted because they have so many nutrients and so many people eat very little fresh anything. But eating greens like cooked in this recipe - boiled for a long time, is probably not all that beneficial. It gives some fiber and so forth.
I am just saying that people might become open to eating more - or other veggies. and it all depends where you live as well. I think in tropical climates, greens and such really need to be cooked since there is all kinds of diseases one can get. Like Hawaii has a snail if it gets on lettuce and you eat it - it makes you very sick...
It's such a big topic. but we know that there are people who smoked all their lives and did fine - but way more who didn't do so well...
Long answer - no conclusion :)