I would disagree, you would be right if the person was claiming all NPCs will be driven with AI but imagine something like a skyrim guard or something will give you more topics to talk about then just a grunt or "I used to be an adventurer like you until I took an arrow to the knee" or "Let me guess, someone stole your sweetroll?". Can give npcs a new life and possibly make them more "reactive" to the events in the game.