The wordless don’t dream for self-evident reasons.
In the wordy world, dreams are where meaning is absent. That makes dreams the only place to go where the absence of meaning is a feature. Meaning gets attached to dreams after the dream is over, is usually how it works.
On top of that, dreams come in a variety of shapes and sizes—fleeting, deep, profound, day, night, and life-changing.
While this explains the popularity of dreams, it also confirms we don’t live in a dream-world.
We live in a word-world.