But then why only pronouns? Are you deliberately ignoring intersectional discrimination? All possible categories must be included lest one identity group is singled out for cancellation.
The answer to this is fairly obvious if you would avoid having a knee-jerk reaction: Because the dimension of gender inflects grammar, even in "ungendered" languages like English, but even moreso in most Romance or Germanic languages.
This is literally the reason many signup forms ask for gender - to know which pronouns to use. Why not just ask that? In languages which have other inflections, those fields are also often asked for - I've worked on software that needed to support Korean honorifics, and even in German you get dropdowns for "Dr." vs. "Prof. Dr.", "Prof. Dr. med.", etc.
German language doesn't even have different words for sex and gender, they are the same. It's just Americans pushing their latest group think on rest of they world. The whole pronoun issue is absurd and invented problem.
The answer to the questions asked on StackExchange have nothing to do with the gender of the asker, they are intended for anyone who has the same question.
From your derogatory reply, I can expect that the new policy on SO is to not lock duplicate questions, then, seeing as how it's a forum for conversation, instead of a Q&A platform.
You ask this rhetorically and like it's some big challenge, but it's genuinely a good idea and straightforward to implement for any community site.