And it's like they actively try to trick you. Those potion racks never have any potions in them, those bookcases never have scrolls. You'll find those in the random vases and shit, so you're forced to check every little thing if you don't want to miss out. You can't just go "ah I won't bother with that barrel over there, I'll stick with the kinds of containers that are likely to have something interesting in them," because there's no rhyme or reason to it.