'Fat' should not be used in kids books as a derogatory, or at all frankly. Fat is an incredibly important and necessary part of a healthy diet and should be treared accordingly. Training people to think of fat in the antiquated notions of bad cardiogy isnt useful.
So while this may have been a move centered around "body positivity", it serves and higher purpose.
Food fats aren't bad. So call them chubby or overweight or whatever you want. Using the word fat, when fat refers to a food product, gives dumb people the impression that fat is a bad thing.
Do you get this concept?
"Thin" isnt a food group. Short and tall, also not food groups.
These are two completely different meanings of the word though? Are you arguing that they need to carry the same semantics?
Should we not call smart people "bright", because people might think light bulbs are intelligent too?
Also, if I call someone fat, that might be demeaning. But it also might just be a description.
Of course nobody wants a negative description applied to them, and it might make them sad, but it's not because of the word we're using: it's because we're ascribing that description to them.