I know this won't be a popular response, but there are so many problems of greater significance (sexist or otherwise) to worry about than the pronoun usage of y

I know this won't be a popular response, but there are so many problems of greater significance (sexist or otherwise) to worry about than the pronoun usage of your outdated textboook in your outdated cs introduction. Is it distasteful? Sure. Is it tactful or responsible? Not very, on either count. Was it intended to hurt anyones feelings? Probably not. Will it prevent this person from reaching their maximum potential, professional or otherwise? Probably not. Given the above I can't help but emphasize the word choice of her friend's response: why care?