You asked for an explanation of why it wasn't antifeminist and immoral to attend the event. I gave an explanation.
Now you are, yes, moving the goalposts. You say no, it's not about interacting with random people. Who said it was?
Okay, so. It's not antifeminist to discuss 'education not indoctrination' with people who belong to different groups, some of which allegedly espouse ideas that some feminists don't agree with. It's simply what happens in politics. People come together to discuss ideas and if they have a common goal they can help each other out.
If there's a cross-party committee on, say, child poverty, it doesn't mean that the Labour MPs are saying they support the Tories about their tax program or immigration laws. Same thing here.