Here it is again
Enma didn't give Zoro anything. Oden's father explained to us what Enma does. Enma only forces the user to release more of their haki than intended.
That only if the user can't control enma. Pay very close attention to the fact Zoro was able to flow his CoA haki from his sword back in his body. That means Zoro has already had the skills to control that large amount of CoA haki released from his body.
It doesn't give Zoro anything. That is just your headcannon.
Hyou explained haki/ryu and how samurais or swordsman uses it.
How can you claim that not what samurai/swordsman us when one was teaching his his haki skills to Luffy.