Recently I just realized whether they are sandbox RPGs, story-driven RPG, or action RPG, the world feels centered around the player, and most "daily routines" NPC perform are just for the players to watch.
For example, the shopkeeper who is selling weapons will never sell a single weapon to another NPC, only the player will buy it. The villagers who keep catching fish from day to night will never gain "fish" in their inventory. A woodsman will never obtain "wood item" despite he chops tree for life. The player is required to consume food, while NPCs don't. NPC who eat food will never consume food in their inventory (or they may not even have food in the inventory, it just magically appears for the players to feel immersive) The list goes on.
While in simulators / RTS, these actions performed by an unit are actually meaningful (gathering resource, healing, etc.), in RPG it has no functions except for to give the player an illusion that the world is "alive." Will this "dynamic living world system for RPG" ever get changed?