You can find CoL calculators out there, and they have their faults, but Seattle is already an expensive city in its own right, and I simply don't see how you possibly got NYC to come out double. That's way out of line with the calculators.
I have a postdoc friend who lives in Seattle on slightly less than I do. They have a huge 1br in cap Hill with parking next to the subway with a short committee downtown or to UW. Meanwhile my apartment is the same price with a minifridge, a 40m commute, and no dishwasher/laundry/disposal.
Plus the PNW is just more enjoyable to explore than the northeast in my opinion. You definitely can make more in Nyc but the COL and QoL is just awful compared to the pnw
A lot of other folks place more value on not needing a car ever, lots of easy food delivery options, and access to any kind or show or performance you might ever want to see without having to travel.