It's a limitation of the video game medium. The consequences of the player's carelessness have to be something that will negatively impact the player (and be something that won't punish other players, if at all possible).
This is just a failure of nomenclature. Thematically, a long-lasting, permable buff to damage is the perfect way of representing that a character is superhumanly strong, stronger than their peers. They should've called it something more concept-agnostic, like Might, when they were creating the set, but they didn't, so here we are.