My Theory:
In my opinion, the rise of "New Wave" skiing perfectly coincides with the rise of big air tricks so gnarly that only a select few people can do them. Because of the sheer insanity of some of the tricks people can do nowadays, there is only one thing us pussys can do, ditch the poles and get some mittens. By creating a new style of skiing, these pros don't have to huck their meat, but instead can invent their own tricks and say its a new style. Now, when someone is doing goofy shit in the park, people don't think that they are bad or dumb, but a pioneer of the sport. Thats my two cents.
BTW I got nothing against this sort of skiing, a lot of it is pretty sick, granted there is some upper garbage. This same sort of innovation can only lead to some good stuff to come.