From personal experience, combine the typical flakines/social non-commital of people from LA with typical nordic asocial behaviors, and that's what you got here.

Add lots of tech people to the mix, a lot of whom would already be a bit predisposed and comfortable with such behaviors, and it gets even worse. Not trying to cast shade on anyone here, I am one of those "predisposed" people myself.

Over the past 4 years, almost all of my closest friends left the city (3 non-locals, 1 who was born and raised here; out of those 4, I only knew 1 non-local prior to moving here) and moved to NYC, and they all couldn't be happier with their decision, years later.

Trust me, I love my alone time and can go without interacting with people outside for days without feeling bad about it at all. But even for me, Seattle feels more suffocating than literally any other major city I've ever been in. Luckily, not staying here for much longer.