It all stems back to a huge coding issue. If we were able to craft black staves a chain reaction in the code would occur causing all monsters in the game to only drop deer masks as loot, Tram and Fel would swap rulesets, every tree in the game would start spamming flamestrike at anyone who came near them with an axe, Rabbits would turn carnivorous and super strong and begin attacking players without warning, cows would give sour milk and Moonglow would drop into the sea never to be seen again.
Thats why we can't craft them.