With every status, we have visual indicators that we are inflicted, and that we are affected. Poison leaves a bubble trail, shock has electricity flowing through us, and freeze leaves a big ol' chunk of ice at our feet to hinder movements.
Curse is the only status in the game to have a visual indicator (the eye above the head + aura) that isn't telling of the status. It alerts teammates that you are cursed, however it does nothing to help you as a player decipher what is cursed.