It was never true and both were originally said by Michael Pollan, an incredibly privileged white man.

For the record, my maternal grandmother heavily utilized canned and processed foods in her cooking. Her mother did the same and all six of her sons died from heart disease in their forties, fifties, and sixties.

My paternal grandmother was similar to my maternal grandmother. Her mother was incredibly poor, so she relied heavily on processed meats and wheat products. All seventeen of her children developed type 2 diabetes, yes ALL of them, the complications of which killed my grandmother and at least three of her siblings. Remember that it was commonly taught that sugar gave you energy and was healthy for you! My nonna and bisnonna loved white bread and sugar in their sauce and it killed them.

It only rings true if you never question its wisdom.