Yet, it appears that you will assume that we will assume that you are male. Why? Because you are on HN? Is this not buying into gender stereotypes?
(I am a woman. I am sometimes referred to as "he" on HN. I am quite open about my gender and it is specified in my profile. But the default assumption here is that anyone talking must be male -- because tech. This is accepting a stereotype.)
Let's suppose that most HN readers are men. There's no obvious gender signaling in your username. (It's two letters long, after all.) What's wrong with someone using the male pronoun as a default until being corrected? Do you expect commentators to read a user's profile before choosing a pronoun for that user? That would be a big efficiency loss for no real benefit. It's unfortunate that this default bothers you, but it's not the responsibility of anyone to prevent offense-taking on the part of another.
