In essence, she should have applied for a speaker spot because she has experience and knowledge she wants to share with other people, not because her family agreed to watch her kid if she got the spot.
Now if her story is true, the "Sydney-based male Cryptoparty organiser" was being douchebaggy by not contributing to the application for the panel. But perhaps he had more experience and felt that it wasn't fair that this newbie (regardless of gender) was turning a speaking spot that he (perhaps rightly) deserved into a panel, just so that she could be on stage as well (since if she believed that she really had the knowledge/experience to get the spot over the other guy, why didn't she just apply for the speaker spot?). I don't really know what happened, but there tends to just be a lot that you miss out on when you only hear a story from the perspective of just one person.
Non-technical are not unusual at that conference as they know they'll get a wider perspective that way.
Tell me, how would you feel if you had already prepared and turned in an application, and then some random person asks you to instead help with an application for a "panel" to replace the individual speaking spot you had already applied for? That man had absolutely no obligation to indulge the author's desire to have a panel.