Isn't that the same thing? If he theoretically could fight but always leaves instead, he would be a lousy fighter in practice. Looking at the situation a bit deeper, he didn't accept Youpi honouring the agreement, which suggests in Pouf's opinion leaving opponents alive using any reason or excuse is not good. Thus we can deduce he would rather fight than withdraw. But because he does retreat easily, it means he has no confidence in his fighting prowess. The final conclusion: He's weak.