The relation to porn is of course obvious due to the presentation's subtitle, referring to something as a 'money shot' should probably not be considered pornographic in intent, in my opinion.
"I'm co-opting the term money shot, because I think it's very valuable... we all know what it is, if you don't know you can google it because I'm not going to talk about it, but if you co-opt the concept what you come away with is the content people actually care about and that is what people pay for in porn..."
If you can't talk about the title it's probably not a very good one.
I thought that the porn context was quite inappropriate myself and broadly supported Richards at the time, although I also think she should have taken her concerns directly to the organizers first. I'm not really offended by porn, but I'd rather not watch it myself, and it's very predictable that it will be offensive to quite a few other people, who'll feel excluded from that presentation even if they're interested in the technical topic (making effective screencasts). In the organizers' position I'd have asked the presenter to consider something more general, such as 'what you can learn from movie directors'.
Why don't women go into tech? Because they'll be in a distinct minority, and if you're ambitious and have some sense you'll avoid putting yourself in that situation. Better to go into a field like medicine where you're not the odd one out if you're a woman, where it's not unusual or atypical to find women in positions of power, etc. That's the nuts and bolts of it.
Everything else is bike shedding. It's nothing more than "what do people talk like in this new version of the industry where women still have no power?"
So why is it the focus? Because the male-dominated industry is willing to entertain forcing everyone to by hypersensitive about what they say. "Sensitivity" and "inclusiveness" is cheap. It is not willing to take affirmative steps to hire more women, put women in positions of power, etc. That's not cheap and upsets the entrenched power dynamic.
Nursing is a bit of an inverse of tech, 93% women. Nursing has great and growing salaries, similar educational requirements and massive upward mobility... yet men still make up less than 7% of the industry.
Having said that, "money shot" really is a clear reference to porn, and I was surprised to see it used in the way that it was. It's not inappropriate for every venue, but it seems pretty clear cut to say it's inappropriate for the title of a presentation at a tech conference.