Maybe adults, but probably not the people who were taught the food pyramid - children.
Edit: changed the tense to acknowledge this was in the past. Thought that was obvious since the food pyramid was a thing of the past.
Parents of school-age children ranting and raving about how the school needs to stop doing X, when it hasn't been that way forever; and they cannot hear it, cannot absorb it, cannot stop talking about it. Something something childhood trauma.
And I don't think adults on a grand scale question it, or process nutrition labels.
Boomers in particular (who engrained Gen x and millennial diets) are most likely to follow grains (and margarine) diets.