When I fly personally, I’m much more price sensitive than when I’m booking travel in the travel portal for my trillion dollar market cap employer who is flying me out to see a client to work on a deal. I’ve flown out with a couple of days notice plenty of times at prices I would never pay personally. If every single none business traveler stopped flying from SEA, I can guarantee you that they wouldn’t cut flights drastically.
There is a reason that the SEA airport has a special line for check in for Amazon and Microsoft.