Because Seattle's a pretty great city to live in? You can still easily find rent below $1500/month for a 1 bedroom on Capitol Hill, it isn't too insane.
Editing to add Seattle has world-class rock climbing, mountaineering, and hiking under an hour's drive from downtown, and if you aren't doing that you're probably missing out on half the joy of living here.
Editing to add Seattle has world-class rock climbing, mountaineering, and hiking under an hour's drive from downtown, and if you aren't doing that you're probably missing out on half the joy of living here.