I think this has much to do with commercial interests.. if there where a higher stigma around the actual cognitive effects of junk-food and sugar it could generate fewer sales.
A fitting Terrance McKenna quote:
We do not think of ourselves as a meat/sugar/alcohol culture. People do not walk around saying "Oh wow, I'm so high on meat, alcohol and sugar!" but they ARE!
A fitting Terrance McKenna quote:
We do not think of ourselves as a meat/sugar/alcohol culture. People do not walk around saying "Oh wow, I'm so high on meat, alcohol and sugar!" but they ARE!