and what happens if a shorstack doubles up on someone? its $ev diff positive
everytime when you gain money by some action (doesnt matter if its your action, or action of other people) and this action didnt have 100% sure outcome, you got lucky, and $EV diff shows by how much

if someone goes allin on flop vs quad aces, without straight flush outs, your $ev diff will remain 0, cose that hand after allin wasnt affected by luck