IDK what you mean with "speak for yourself" (don't we always speak for ourselves? :S)
Just to clarify, i think it's better to use gender-neutral pronouns when gender is irrelevant, or unknown. And it's easy! I've been doing so writing on English online forums since more 2 decades ago.
But i don't think it's reasonable to get mad at someone, or even attack them, for using male pronouns instead of gender-neutral ones. It doesn't say anything about the person being sexist or hateful. The veeery vast majority of people who do this do it out of ignorance rather than malice. And attacking someone for something they don't even consider as a moral choice —like referring to a generic programmer a "he" instead of "they"— does nothing positive for this world, on the contrary.
I'm curious: have you ever liked Twitter?
Because i could understand not seeing any downside to leaving a site if one has never actually liked it. But, many people liked (and still like) Twitter. I personally have known many interesting people there, and even started some nice in-person friendships. I don't like at all what's become of Twitter; i have it now blocked through the LeechBlock extension so i don't fall into doom/shit scrolling. But i think there's still some good in there. I can totally understand how many people would find it difficult to fully leave; myself included.