“This is largely because of all the nonsense perpetuated by the “diet” industry”
Because who can you trust to have unbiased information? The official pyramids were bought and paid for by food companies. We get a steady stream of random studies and news articles with statistically insignificant studies that contradict each other and all the healthy food nuts are into garbage science and vague scaremongering.
That is so typical of a large percentage of info that we have to filter through these days. And with common sense becoming scarcer by the second, people's ability to develop informed decisions has become severely compromised. Supposedly higher education was suppose to help with this, but these days out institutions of higher education have become leftist drone factories.