Non-functional thinking can foster pleasure but also fear, anxiety and sorrow. So fragmentary perception is OK only until it's OK.
A beautiful theme song in a movie can lead to pleasurable reminiscences which quickly turn into sentimental sorrow.
It can be tested that when there is no thought about something, there is no problem relating to that something.
When there is no thought, there is no perturbation at all.
It is a fact and a contingency of trying Unitary Perception.
But this event cannot be described or understood in fragmentary perception of thought.