So all this time Zoro knows about the concept of Swords choosing it's wielder, and of all the Swords he has had over the years (Wado included) he said that FINALLY it has come. The Sword that has chosen him.
Oda is going to need to extrapolate on this, cause the implications are that Wado and Sandai haven't chosen him. They are still just temp Swords for him, until he finds two others that choose him.
Neither Marco nor Katakuri has ever showcase such destructibility. This is far outside the weight class of those two, and "YC1 level" is just a community label to benchmark feats. Just because they're in the same position doesn't mean they're equal or even similar in power.