Is pirating video games wrong, assuming the person who pirates the game would not buy it anyway?
What's considered wrong or not is not really for me to say. 

Objectively, when pirating video games the studio doesn't have the income it would normally have from selling that copy. So you could say that there is no difference, from the studio standpoint, between pirating a game and not buying it.
But if everyone just pirates them, the studio doesn't make any money at all, right? So there is a difference.
Sure, if everyone pirates them. But you were stated a situation in which the person would not have bought it anyway, in this scenario there would be no difference.