yes, i wasnt advocating you should know any specific grammar. and that distinction is a good point. I meant that learning a prescriptive grammar decently is an important tool for reasoning. im not saying that descriptive grammars are bad, just defending that prescriptive grammars arent as useless as people seem to judge them.
yes, its very arbitrary, but these are sets of rules that you can use to structure your thoughts. language helps us reason. it doesnt matter that it is arbitrary. definitions in mathematics are very arbitrary, but they are a foundation we can lean on to reason about abstract ideas. Being arbitrary is not a testament of uselessness. Different languages, lead to different foundations for structuring ideas. But dominating at least one of those foundations can be very important cognitively.
i think that being used to properly structure sentences is important for reasoning well.
i agree that the effects of books and writing were probably beneficial to the brain, although they might have atrophied the memory and something else. But im not sure about tv, radio, internet and AI.
but are they wrong though?
what do you mean by “explicitly non gendered”?