It's not "incorrect". You just don't like it. There's a fundamental difference.
> It allows you to think for yourself instead of just parroting "he is gender neutral" because you read it in a book.
That would be meaningful if English grammar was some kind of performance art. Instead, it's a fact that must be learned through study - yes, by reading books that detail what the rules of the grammar actually are. If the established grammar says that "he" can be a gender-neutral pronoun then it can be a gender neutral pronoun. It's not a matter of opinion. It's not up to you to be, like, independent of The Man's English, or whatever.
> It allows you to think for yourself instead of just parroting "he is gender neutral" because you read it in a book.
That would be meaningful if English grammar was some kind of performance art. Instead, it's a fact that must be learned through study - yes, by reading books that detail what the rules of the grammar actually are. If the established grammar says that "he" can be a gender-neutral pronoun then it can be a gender neutral pronoun. It's not a matter of opinion. It's not up to you to be, like, independent of The Man's English, or whatever.