Diamonds (crystals in general)

So, I've been thinking about diamonds, or crystals in general. After the 1.16 update, the Netherrite replaced diamonds as top-gear materials. That brought me to think; why not remove diamonds completely? And I'm not saying that diamonds should be completely removed from the game, but rather as an material to make tools and amor. I'm not saying that diamonds should be rendered useless, what I'm trying to say is that diamonds (or crystals) should have an alternative role in the game as an enchanting material. Crystals should be more used to bring specific enhancements to amor and tools, as an example: diamonds giving defensive capabilities to your amor, or ruby (even if it's not on the game) could give offensive power to your weapons. Diamonds should be removed from being an material making tools, so other types of crystals can have a chance coming in to the game and have it's unique property.