You'd be right if you got the CS degree by taking the easiest classes, doing as little as possible, and partying.
On the other hand, if you carefully select the courses, work to get the most out of the opportunities there, etc., you can get a very valuable education at UW. I've seen it too many times for that to be a fluke.
UW isn't going to hold your hand, it's up to you. There are a very large number of local UW graduates who became wealthy.