It's not true because men and women are both brought up in the same power structures. There are plenty of women who believe that women's rightful place is in the home, that buy into the notion of modern beauty, and that don't care about women's rights (aka abortion, rape, etc).
That being said, I'd buy an argument that said women are more likely to be aware of these issues. Or even that women are less likely to be sexist. I suppose I took issue with your assertion that women are MUCH less likely to be sexist. I guess it's an argument of degrees.
Thanks, and sorry for the snark but it's way too easy to just talk past each other about feminist issues in general.
My memory is a bit fuzzy but from interviews I've read with models, most of them (male and female) are against the "power structures" you're talking about. The only model I'm friends with is definitely not the sort of girl who believes her place is in the home etc.
I think he meant that what you said is not true. I.e. he is stating the inverse: "Having women involved in the creation of something does not have significant impact on whether it is sexist." Although I don't get how that needs to be clarified.