Nice analysis. It really bothers me that (some) people think that eating like someone from the Neolithic period is the healthiest way to eat--we have obviously changed since then, as you said. Honestly it's cool to look at different ways of eating and what not, but the obsession with perfecting our diet, yknow "don't eat this it turns out it's really bad for you" or "eat only this it's the only way to get X result" is really starting to wear me down.
No one diet is perfect for anyone and a lot of the articles on these topics are just advertising for particular diet sites/books/pills whatever and not actually meant to help people be healthy. Many times they actually result in bad health.

Not to mention that being bombarded by that kind of content can make some people (myself included) feel paranoid about eating at all, as if no matter what you try you'll always be doing the "unhealthy" thing.