It seems like everyone in these places is just trying to re-invent a "cooler than thou" image, looking down on others who don't prize their typically temporary life-style choices. The gleeful embrace of self-imposed bohemian poverty, and the hatred of anyone who wants material possessions, is particularly annoying. As someone who grew up in poverty, I really hate getting lectured on how meaningless money is by a dread-locked trust fund kid who is waxing poetic about how great of an experience it is to "live simply." They don't seem to get the fact that for some of us, a "tiny house" is exactly what we fucking grew up in, except it wasn't considered cool, and was stuck next to a bunch of other tiny houses called trailers in a community called a trailer park.
The point is that the people in Seattle that act like assholes to you almost certainly fall into this category of idiot.