I swear back when Carrie was around, this argument came up. Something about the character attacked being affected differently if the ability used during the turn was considered an attack or not. Like how BB8’s ID is an attack even though it doesn’t cause damage or call an assist. I think there was discussion about how some characters with similar abilities interacted differently with the attacked toon differently.
It may have been associated with landing certain debuffs, but I swear it had something to do with what the original ability was considered. And if that is part of the design of a toon, then abilities with assists might be considered as attacks (and therefore unable to be used on allies with daze) unless they specifically benefit game design to allow the ability (like finalizer). That would explain inconsistency. But IMO still doesn’t make logical sense.