It takes less than 1 minute to duel and earn 5 house points, yet it takes around 90 minutes to brew a potion to earn the same amount of house points. Brewing potions is actually difficult and requires thought, not just clicking the same pattern for the full-body bind curse over and over. Plus, you have to buy some of the potion ingredients. Dueling is free. This is not right.
POTTERMORE!!! *shakes fist*