I think because we live in an environment which is filled with junk food everywhere and often people who will try to encourage us to eat it then there is no other choice than to be obsessive about what we choose to eat and what we choose to avoid. If we lived in an environment where the only foods available were real foods, no carby junk, things might be different and perhaps we could be less concerned with what we chose to eat because there would be no truly bad choices. But that's not the world we live in.

Jean