Minecraft wiki entry for Gathering_resources_on_peaceful_difficulty, associated text: Because most hostile or neutral mobs do not spawn in Peaceful, sometimes it is hard to gather these resources. Also, this page may be helpful when playing any Survival world, if you do not like to fight monsters, but want to get the items that they drop. Another use of this page would be if you want to play Minecraft without any data packs, as this will disable mob drops. However, it will also disable loot in chests, so trading with villagers is one of the few ways you can acquire these items.