Sure, radiant AI is trying to simulate real life activity for the NPCs. But seriously, I really don't care about what they do everyday. On the other hand, it makes it really hard to try to find them (yea yea I know there's the magical arrow, but if we mod it out to get a challenging gaming experience, it's impossible to find an NPC cuz they could be anywhere during the day, and at night they are locked up in the houses). It's like every effort in trying to simulate real life in a game, it doesn't feel right until you put every aspect of real life in, which is not possible with today's technology.
If they use radiant AI, they should at least give you the option to ask another NPC where and how to find a certain person.