Yeah, can never break him in the octagon at 155 but he's too scared to go up to 170 and not have to deal with the weight cut to 155. He's cleared out 155, yet he won't go up to 170 to really test himself. And if he really wanted that GSP fight, he wouldn't need GSP to go down to a weight GSP has never fought at before. He would go up to 170 and fight GSP there.
All the tales going around of Khabib dominating guys bigger than him in practice, yet he kills himself to make 155? It's very contradictory. If he dominates guys that fight at 185 in training, going to 170 shouldn't be a problem. He's retiring at his physical prime instead of going up to 170. On top of that, claiming he fights for legacy and not going up to fight GSP at GPS's weight class? He can cement a true legacy if he clears out 2 weight classes. Khabib's the Floyd Mayweather of MMA.
Source for that?