Because he feels he has a better chance against Bones. How is LHW stacked? LHW is one of the weakest divisions in MMA at the moment. The last two title contenders are MWs... I think you should check things out before calling people morons, otherwise it only makes you look like one. Goose/Moose winner and Teix are the only true LHW title contenders on the horizon, all of them are booked to fight and Glover still hasn't fought anybody good in the UFC.
Hendo, Machida, Mousasi, Glover, and Gus. That's up to three guys who have the chance to make a legitimate claim of being #1 contender by the time Bones/Sonnen is over. Belfort was a circumstance and Sonnen getting a shot is pathetic. But who is there at MW? Chris Weidman? Someone that 15 people in the US have heard of?