Spring 2010 RTW - Viktor & Rolf

Why is it that Project Runway designers are always admonished not to produce looks that are too theatrical or "costumey," when in the real world we see it on a fairly regular basis? For example, Dutch designers Viktor & Rolf's Spring 2010 collection, which should be called "Tulle Academy." It's all very interesting and sculptural, but I can't see anyone making the investment in any of these pieces, nor wearing them, apart from perhaps the pink gown towards the end.