You may not have been personally offended, but if you're not able to understand why somebody might have been offended then that really does sum up why lots of people think tech has a problem with misogyny.
The fact 'it was a joke' really isn't an excuse...I'd argue it actually makes it worse.
I don't understand why the presentations in question were sexist/mysoginistic. Immature? Yes. Crude? Yes. Probably shouldn't have made it on stage? Yes. Sexist? I'm unconvinced.
I also don't understand why they were only a problem because they were "sexist". The apps were parodying behavior that well... many men engage in -- which is something you can acknowledge regardless of your gender. The immaturity alone should have been grounds for exclusion. Calling them out specifically for sexism seems to be a little heavy handed.
Were there shots of men's cleavage? Nope? It was sexist by any reasonable definition of "sexism". Pointing that out isn't "heavy handed", it's the truth.
Whoever doxed them was heavy-handed, but since I haven't seen any threat worse than "I will never work with them" apparently not that heavy-handed. There are consequences for performing your sexism for all the world to see.
Let's say I've just spent the last 30 years on an isolated island in the south pacific. Could you define sexism for me, please, in a way that doesn't make it sound like "thoughtcrime" from 1984.
Except we don't. There are no clearly defined rules of what exactly defines sexism outside of "referring to women in a a way that makes anyone anywhere feel uncomfortable." It's entirely subjective and based on community, culture and societal standards. It's a landmine with wheels. Even if you stand perfectly still, it could bump into your leg at any moment and, I don't know, annoy you to death with shrill platitudes about patriarchy.
The fact 'it was a joke' really isn't an excuse...I'd argue it actually makes it worse.