While overfitting is always possible, in this situation there is an easy causal explanation for why toxic players could be toxic employees. From my experience p

While overfitting is always possible, in this situation there is an easy causal explanation for why toxic players could be toxic employees. From my experience playing Dota I know that if I was stressed out by work or life I would be more toxic in game. In general another way to phrase it is that correlations in the past strongly suggest correlations in the future. This is especially true when you can think of reasons the variables are causally related. If they did this study and found that employees whose favorite cereal was frosted flakes are more toxic I'd be much more skeptical, as that could indicate they were doing a shoot everywhere and see what sticks approach.