Fair enough assessment. I tend to agree, we are currently stuck with a GSP that is 37 years old, inactive, and has bum knees but it may be a testament to how good he really is. Even in his less than prime state he is better than most if not all the 155'ers and 170 pounders. I think Khabib can win but some obstacles would be GSP's reach which I think is something like 76", his complex jab game, Georges uses about 6 different kinds of jabs, and his fight I.Q. which may be the highest I've ever seen.
In summation, yes Khabib can win, but if he does GSP will likely make it the hardest fight of Khabib's life. If I had to bet money I guess I would put it on Georges.