hahahaha that's a funny theory, Tomi! I don't think it's that. I think it's money. It's all money driven. Weed free crops means more nutrients for the crops, which means higher yield, which mean more money for the farmers who sell their corn. The farmers want this stuff... and the biotech firms just keep pumping it out b/c we have a world to feed, you know!
There was a question on the Whole30 thread about whether or not companies know the products they're producing (consumer products, I mean) are poisoning people or if they're just as clueless as we were before we discovered Primal/Paleo. Surely they've seen the research and know the problem exists, but because the government hasn't stepped in, they're continuing on their merry little way of making money off of our sick people who are now addicted to unnatural foods.
It's nice to see the trend of those moving to Paleo/Primal though. The grocery stores are getting more "natural" foods and produce sections are getting larger (at least in our small little grocery where I live it is). But I think it'll be another 100 years or more before processed foods are less prevalent. Processed is just too convenient and people seem to always put convenience above health (hence taking pills rather than changing things in your life to fix the problem - bandaid on a gusher, so to speak).