Sure, but by definition a KU is an extreme event. Put all storms on a bell curve and we “define” KUs as those storms well above that +2SD threshold. Everything has to come together to reach those upper limits.
Edited my post more. I’ve said it before…I think of the systems and their “energy” as bodies in spacetime…the more potent or massive they are the more they bend the spacetime. Small bodies have less pull on massive bodies but can still affect their trajectory if they’re close enough.
Happens in a lot of systems
I mean it’s just different shortwave interactions…some tend to fuji/rotate around each other, sometimes it’s a kicker, sometimes it’s a phase which initially usually starts as fujiwara.