He doesn't have to be.
As a yc1 with just coa one of the most durable characters told the 2nd most durable character to dodge an attack
Same zoro with a broken body scars said 2nd most durable character pre power up.
Zoros ap then raises exponentially through koh.
Zoros ap is already monstrous
Fatty is a normal human with above average endurance
Endurance means nothing to swordsmen
As a yc1 with just coa one of the most durable characters told the 2nd most durable character to dodge an attack
Same zoro with a broken body scars said 2nd most durable character pre power up.
Zoros ap then raises exponentially through koh.
Zoros ap is already monstrous
Fatty is a normal human with above average endurance
Endurance means nothing to swordsmen
1. Do you think current Zoro as he is can beat Teach or is even on his level?
2. Do you think that Zoro can land an Asura?
I know the answer to number 1, Zoro isn’t. And if your answer to number 2 is yes then Teach doesn’t get one-shotted, simple. Because that means that Teach will lose the fight.