I absolutely do.
While there must definitely be a strongest fighter whom no one can singly defeat, I do not believe that there should be any fighter so superior that no combination of other great fighters or strategies can defeat him/her. There must be some limit, or we're not talking about the martial arts of human beings anymore, but about omnipotent gods. Wuxia fiction is about human beings...epically great human beings, but definitely human beings, not gods. If we were interested in gods, we'd read mythology and religious texts, not wuxia.