Because **** that guy!
In all seriousness, its for the dumbest of reasons. My ex gf was insanely obsessed with the guy and it annoyed me to no end. The hate for him grew and knowing him leaving would make her sad, I'm all for it.
I'm never into one year wonders either though. He's never proven he can play worth a damn before this season. He's been a product of playing with Getzlaf and Kesler. Take that away and he's meh. Plenty of better options out there.