Those books from the latter half of the 1900s about how to deal with kids just sucked. They all had various ways of trying to force kids who were any other shaped peg but round into a round hole while making the parent(s) feel justified and right about it.
“How to make your child inconvenience you less and not diverge from societal conformity requirements”
We still have similar books today, but those are bought by parents who refuse to acknowledge their kid is different and want conformity for who knows what reason…personal prejudice, religion, personal failure because of the aforementioned, etc.