Agree, but I think there is another reason. Someone on the outside is going to look at this and see that a high-profile hire was only given three years and wasn't even given three full recruiting classes to rebuild the program. On top of that, the high-profile hire had to play backup QBs in most of their games because the high-profile transfer QBs they brought (bought?) were injured most of the time. Add to that being a head coach during basically the Wild West of college football with players going to the highest bidder...
Is a prospective coach going to feel like he will "get a fair shake" at UW? Is a prospective coach going to feel like there is extra risk in taking the job and will have a really short leash?
Increased risk needs to be countered with increased reward. A prospective coach is going to have to really want to come to UW, or is going to need to be paid more to account for the perceived increased risk of a very short leash. You don't get a better job after you get fired. Since UW has never competed for national championships, they will be on the same level as Oklahoma State or Stanford as far as program prestige and then it comes down to security and support.
(Stanford's coach was fired after a short period of time, but it was for cause - bullying and belittling female staff members.)