I tend to agree with just about everything you said. In theory, of course, everyone is operating in their own self-interest, especially corporations. The object of a corporation is to make money for the owners. It doesn't really work out that way in practice, though. The way it really works is that the corporation makes upper management wealthy, sometimes incredibly wealthy. And wealth equals power, whether or not it's exercised. How much difference it makes to you or me is another matter.
I believe that it is in the nature of many people that once they've made up their mind, they won't change it, no matter what. Alternatively, facts are irrelevant, sometimes because the issues that really matter are not being discussed at all. And it goes without saying that morality and ethics sometimes don't matter.
I realize there are places in the world where more people than average live exceptionally long lives. But from what I've read, there is conflicting information. As I recall, they weren't all necessarily happy, although happy is an elusive term. None ate a lot, though. I don't think any of them lived in urban areas, either. But I also don't recall there was any mention of coincidence about people living longer than average in certain areas.
On the matter of living longer, I keep remembering two things. First, Thoreau advocated a plant-based diet, which I believe he really followed. That was also long before processed foods and additives. But my diet is full of meat, food additives and highly processed foods and I'm almost 30 years older than Thoreau was when he died. In some respects, whole-wheat bread is not natural. So be careful about tossing around words like natural or organic. A 100% organic farm is no better place to work than one that isn't, either.
Thoreau never married. It's said married people live longer, though the joke is that it may only seem that way. Interesting point to think about, though. I think most of those old folks in the studies were married. Also, as near as I recall, some of those places were in Communist countries, which would nullify any positive results of any study done by a conservative American organization, if you follow me.