Board Thread:Lore Discussion/@comment-205.213.163.86-20150105211110/@comment-16047389-20150112154759

If it was a cure, then the next time the Bearer of the Curse died, they would remain dead. Vendrick found a way to prevent hollowfication, which depending on who you ask was the only real downside of the Curse to begin with. Still, the process can only affect one person (or perhaps four, if the blessing does indeed exist upon each of the four crowns now), and doesn't actually remove the Curse, so it's hardly a "cure".