Angeline, you're so right about that. Back in 1965 when I was a chubby 4 year old, my pediatrician cautioned my parents not to let me have sugar at all and to very much restrict my intake of bread, rice, potatoes, bananas and watermelon because too much of such things was only going to make me chubbier and instead urge me to eat more vegetables, proteins and fruits like apples and oranges. Obviously, I don't remember that but that is what my mother related to me when I was grown.
I also remember my cousin dieting in the late 60's/early 70's by cutting out bread, rice, pasta and potatoes and intead eating meats, eggs, cottage cheese and salads (hmmm...now what plan does that sound like) because "everyone knew" that if you wanted to lose weight those were the foods you needed to cut out or at least cut way back on.