If you're hyping up a female founders meeting, yet you bring no "working code"(female founders), it's going to be hard to take you seriously.
The same could be said if someone put on an event to encourage "African American startups" and yet when people show up the only people there who were "successful" were white people. It'd piss people off.
If the notice really said "females only", then it should have actually been females only. If it was being hyped by a successful female founder, then perhaps there should have been some female founders there. You need some examples, some role models people can relate to. Male founders, while possibly having good advice, are obviously not female founders.
People say they're disappointed that more women aren't in the tech field, but then they don't actually track down some prime examples of successful females in the field to pick their brains and find out why that might be. Rather silly if you ask me.