My dear old mother was right all along about eggs... and she is right about hydrogenated soybean squeezin’s too.
I think there was some correct nutrition knowledge around in the late '50s and '60s that was supplanted by all the cholesterol/dietary fat advice that came along later.
My mother used to say that too many "starches" were not good for a person, and she never allowed soft drinks to be bought and kept in the home. She limited sweets and refined carbohydrates.