She used ACoC punch, she can ACoC period. If she needs to use it then she will. BM was unleashing her CoC as per Speed's words. She may very well have been off-panelling using offensive ACoC then decided to switch to using her offensive DF.
She is using defensive ACoC here.
The way she was using her DF, it didn't matter whether she used ACoC or not. Her ultimate moves are not ACoC based. Is that too hard for you to swallow? Kaido's ultimate move does not show any ACoC. Well now.
Or, and get this, maybe Kidd actually has better durability than King because he has better feats? Isn't this how you're supposed to powerscale? King lost to ACoC, Kidd tanked attacks that hit harder than ACoC punches. You do the math.