There are many ways to break this down. First off, in the park i think the main reason is because the women's side of the sport hasn't progressed as much, so the they don't have to throw down as hard to do as well, but that doesn't mean they aren't capable. In the big mountain side i think women throw down just as hard. Back to the park, naturally men are more muscular because of more testosterone, so their physical strength has potential to be more, but i don't think that it necessarily helps for everything. If you look at womens gymnastics compared to men, in my opinion, the women look better because of their finesse although the men do crazier thing i.e. triples. So you apply that to skiing and the outcome is the better execution of tricks for women, and the "gnarlier" tricks for men. That is just a theory though, not fact. Also skiing is mainly mental and that is where women may have more trouble because they seem to think of consequence too much. When i ski i always think of what im gonna do and think what's the worst that could happen, even though the worst is obviously death it just helps me because it makes me realize that i am able to do the trick.
In a nut shell, women have potential to be the exact same as men, they just haven't reached that level yet. I mean look 8-10 years ago men were having trouble doing 360's and a switch 7 would win a comp, now its progressed, just as womens skiing will do, in my opinion.