It's fair enough that you don't appreciate urban but that doesn't mean that it isn't a part of our sport. I don't think one aspect of our sport (pow) should be considered more important than another (rails) when calling someone "well rounded".
Hornbeck pretty much slayed urban, park rails, park jumps and backcountry jumps. Rainville's mostly falls into park jumps, powder skiing and minigolf, with a couple of pretty standard big mountain shots.
I agree with you to some extent, I'm really just trying to provoke some thought here for what a truly rounded skier is - someone who does all aspects of our sport. Urban, powder, BC jumps, real big mountain, park, moguls, creative jibs, pipe, racing, rails, cliffs.. It's all part of it.