One telling thing is that most of the top extremists who have long been skiing highly technical routes, which sometimes also include huge air, have a couple of decades of serious skiing under their belt. Quite often with a competitive training background.
Its been noticable that the age of many of the 'stars' has gone down quite a bit, and many don't have nearly as much time on their skis under their belt. Because frankly, just hucking - even with a backflip now and then - doesn't require the experience/skill that technical route-finding and skiing (and air too) do.
Are there some fabulous skiers who can both really rip in all conditions AND huck huge air and tricks? Sure. But the silver screen seems to be mostly dominated now by those who can only do the latter.