Yes. Luffy woudn't have it if kaido didn't exist. That is 100% true. Luffy learned from seeing kaido use it. He didn't pickup Kaido's Magical Kanabo that sucked haki for no reason and gain it.
In alabasta he faces mr 1 who couldn't be cut no matter what he tried
He grows mid fight discovers breath of all things and finally gains power to cut steel
Zoro goes through similar trials against near invincible King that couldn't be cut even by attacks that were slicing up Kaido
Unlocks his adcoc to overcome the defences of King and defeats him using his newly awakened powers. Regardless of what sword Zoro used he would have been forced to grow proving how irrelevant enma is in all this. Enma draws out wielders Ryuo not coc, it was Zoro himself who figured out and put together how to coat his attacks in it. The rest was sword giving Zoro trouble making the fight even harder for him