Well, maybe my community is special, but like I said, I really don't know anyone that likes that stuff. None of my friends eat the processed stuff either. I grew up in a fairly standard American community in Florida, and I didn't grow up eating processed food, and neither did most of my friends growing up. When I lived in Rhode Island it wasn't popular there.
It seems like all along the West Coast here, there is an incredible variety of fresh food available... huge amounts of really fresh veggies and fruit, lots of small artisanal dairies and bakeries, etc. My grocery store probably has 100 kinds of cheeses (and come to think of it, I haven't actually seen the cheese squares there, and I'm positive they don't stock cheese-in-a-can), as well as a warehouse-sized area of produce. Around here, it's really standard for people to eat about like I do.
The middle of the country is probably more like what you're talking about, Marmaduke... I'm not sure why.
I showed this page to my husband just now - he sort of laughed derisively and said that the last time he was in London, he and his friend walked for MILES trying to find someplace to eat that had any veggies on the menu, or anything that wasn't fried. Marmaduke, I'm guessing you live somewhere else?
All of this is to say that the blanket statements about American cuisine are not particularly fair.