So you need to create a condition for your scenario to happen. The fact that at any point in time, there's a non-ACoC users that is stronger than ACoC users (Admirals vs Yamato for example), is conveniently ignored?
I'm not trying to downplay ACoC users, it's your logic that is flawed.
Your logic will be correct if by the time someone can use ACoC, they would be straight away > non ACoC users without question. But that didn't happen, when Zoro/Yamato can use ACoC, they didn't automatically be > Kizaru/Aokiji for example.