Are you claiming that there is any culture in the world where strong men are not celebrated for their advantages in fighting and defending? Are you saying that strong men are not aware of the physical advantage they have over weaker men and aren't, therefore, more inclined to press a dispute to the point of violence, whereas the weaker man might find a way to diffuse conflict or acquiese to the stronger man? Whereas the weaker man may have to rely on verbal persuasion and other problem solving techniques when confronted with the stronger man?

I work in medical science (oncology clinical trials) which is quite a bit different from anthropological or social science research, but the point of research is to build upon what we do know. I don't know why the professor is required to pretend that the question of whether or not societies value physical strength in men is an open one, or that his knowledge makes his work biased.