Minecraft wiki entry for Things_not_to_do, associated text: The Mending enchantment can make the use of high-end tools a much better proposition, especially when paired with Unbreaking and/or Fortune. A Mending pickaxe that is used to mine ores that give experience never breaks because the experience from the orbs repair it instantly. In this case, the durability from diamond/netherite also allows it to mine other stuff and it can always be taken to an experience farm for more repairing. A diamond/netherite sword with Mending can last forever when killing monsters, making the high damage from diamond/netherite a much better investment. With the current villager job rules, it's possible to change the job of your villagers to one of your choice, and reset them until they have a desired trade, making it a lot easier to get the Mending enchantment.