@Nedrocks, "It seems to have more in common with the chemical industry than food. " - very well put!
I also think it all goes hand in hand. The food industry needs to sell their products. We live in a culture that highly values scientific findings and report. They enlist scientist to show that their "food-like substance", or "imitation" like Pollan calls them, as good for you, heck why not even better than the real thing. Eventually that catches on through journalist reports and press release.
This makes me think of the formula revolution back in the '50s(ish): now we have formula for babies, which we know exactly what is in it, nutrients and all. Why breastfeed, if you can control the nutrients with formula? We have no idea what is in breastmilk, and if we don't know what's in it, then it can't be good. (slight omission of the fact that it was perfectly good enough for millions of year before that).
I agree with @kcoleman, that there is a place for scientific exploration and discovery. But it should remain for the sake of curiosity, not to dictate how everyone should or shouldn't eat based on the latest fad (which history have often proved wrong a few years later)