@LovePeonies
I have a constant monologue, but it's not in any way a part of the conscious thought process about functional things.
So for example, I'll be sitting browsing this thread, while visualising inside my head a scene from a book I've read recently, the monologue is busy reciting the lyrics to a song I'm subconsciously listening to inside my head, and the non-monologuing part of my brain is thinking 'hungry, dinner soon'.
The monologue doesn't really ever commentate on whatever is the primary focus at that point, it's usually off talking through something abstract, or replaying past conversations I've had etc. The 'functional' part of my thinking is, like yours, almost instinctive, and doesn't require my monologue to actually 'say it' for my brain to act.
The only time it tends to be unified is if I'm pondering a problem that requires serious concentration, then everything, the monologue, the thing I'm physically looking at, the internal pictures my brain is conjuring up, all of it becomes focused on the issue at hand.