Certain parties like to fuel the outrage flame because they make money on clickbait. There are also just people with an axe to grind that get off on starting fights. Then you have people that will swear up and down that there is no gender problem in tech, nothing wrong with 'brogrammer' culture, etc. The reasonable people in the middle all think they are arguing against the extreme views, but just end up fighting each other because they misunderstand each others' view points. You have people that have directly experienced sexism in tech thinking they are arguing with the deniers when in actuality they are arguing with people who think their interlocutors are just the angry people looking for a fight.

Messy. And no women are persuaded to learn programming, and no one wins but those websites making money on advertising. Everyone comes away angry.