Because the showing against Bill, /again/, is not any kind of pure strength showing. You cannot use it to claim such things.The showing against Ravenous? The showing against Bill?
Edit: I mean, no Surfer is not a planet buster strength wise because of the showing against Bill, but casually slapping around class 100's now? Why not?
When the Surfer spends a chunk of that fight demonstrably not wanting to fight... not really.Prior to that, they were shown on even footing.