Every sword has a soul right? That's what Oda told us through words of Kawamatsu.
Swords also have their own will as Zoro was saying Sandai Kitetsu was cutting more than Zoro wanted it to on its own.
Then why does Enma having those abilities mean a big deal?
Desperation because Zoro is Yonko level character even with a nerf like Enma downgrade from what Zoro will make Enma, a black blade?