The fashion world isn't about real life. Unless you're a model or celebrity, you're not really expected to wear Fashion-with-a-capital-F while shopping for groceries.
Most of the time, those crazy looks point to trends that will trickle down to the mainstream in much more subtle ways. A huge dress made of ruffles bigger than you can imagine could just mean you'll be seeing tiny ruffles on blouses and skirts next summer.