The harm that a FOO only conference does in directly proportional to the representation of FOOs in that industry, in terms of lost opportunities for networking. And the benefits to FOOs in terms of being able to compare experiences with other people like them that they might not be able to do otherwise is inversely proportional to their representation. It might annoy you and that's understandable, but it's still a reasonable thing to be doing despite the exclusion it causes. If half of all founders were female maybe thing would be different, and I honestly think that male only conferences for nurses or educators might be a good idea.