Amazon has more employees at about 110,000. It has about 15,000 in Seattle. Those are mostly highly paid engineers, managers and programmers. It's hiring like crazy.
Boeing has about 170,000 employees. About 81,000 are employed in Washington state.
T-Mobile has about 4,800 employees at its local headquarters.
AT&T near Seattle manages operations in the Western US and performs engineering and testing. It has 4,592 employees in Washington.
Adobe's Seattle office employs about 500 people, focusing on product development and operations.
F5 employs over 1200 workers in Washington state.
The Seattle area hosts Google's third-largest engineering center. It has about 1000 employees.
You are simply wrong about the speed of internet connections and the government. Areas in the north has access to Verizon fiber. Other areas have access to high speed internet from Comcast. As for the government, they're working with private companies to establish citywide fiber. People aren't electing "anti-Internet candidates", whatever the hell those are.
So yes, Seattle IS a significant tech hub.