Very well, if you insist on reducing this match to an encounter out of a nature documentary, I will concede that Kermit isn't much of a fighter. But I will also point out that he is the de facto leader to a bunch of misfits who have a cult-like devotion to him. Consider the deadly karate chop of Miss Piggy, or a Ginsu-wielding Swedish Chef, or an untethered Animal. And let's see him try to survive Fozzie's latest stand-up routine. Without Kermit, they all would have been nobodies, and they will turn Louie into a new belt for Gonzo before they let him harm even one flipper.
Name recognition supercedes experience.
Judging by your rank odor and the empty bottles that pile up in your WWWF office, I'd say you don't need much incentive. The reason there are spokesmen in the first place is so that a little bit of the spokesman's image will rub off on the company. If you've ever tasted Budweiser, you know it must be a struggle for them to be taken seriously. That said, Kermit will make a great spokescritter. He worked his way out of the swamp with nothing more than a dream and a song.