Games experiences are carefully crafted. Minecraft is not a world simulator, or an RPG (I mean, without mods), if you added such features in the base game, it w

Games experiences are carefully crafted. Minecraft is not a world simulator, or an RPG (I mean, without mods), if you added such features in the base game, it would change the experience dramatically. I'd say that the reason they didn't implement it yet, is simply because it's not the experience they want to give. Never underestimate how hard it is to create the game experience you want. There's a reason why a lot of NPC AI in videogames are dead simple: it's easy to implement, players easily interact with it, without being confused, it follows rules carefully crafted for the game experience, it's easy to debug and test etc. etc. Also, how many games like rimworld, DF exist in 3D ? That's right, none that I know of. Making this kind of AI in a free 3D space becomes a whole other story. I think it works well with 2D minimalistic games, because the player uses its imagination a lot. In 3D you can't really leverage this. Anyways that's my 2 cents on why not every game implements it.