It is also pretty useless. Normal people can't parse probabilities - otherwise nobody would play in the lottery. If you have a list of 20 items with non-uniform chances, can you tell how long you need to play before it's likely you'll get an item you want? You and me can, by doing little math in head; most people can't (and it's another question whether one has the willpower to do such math and follow it through while tired, unwindng in front of a casual game).
What would be more useful if they listed the expected number of loot boxes you need to buy to get an item. "2% chance" reads differently than "you'll need to buy about 50 loot boxes, on average, to get that item".
What would be more useful if they listed the expected number of loot boxes you need to buy to get an item. "2% chance" reads differently than "you'll need to buy about 50 loot boxes, on average, to get that item".