Don't worry about it. There are no such things as dreams; they're the brain bullshitting itself when you wake up in an inconsistent state. If you have a very complicated or imaginative life, your brain has to do a lot of work at night doing a very lossy compress of everything interesting that happened that day. If your sleep is restless or interrupted, you're more likely to still be in this process when you awake. Your mind can then attempt to rationalize how it reached this state [edit: filled with malformed images, associations and features that lack wholes.]

If you have some combination of a life of habit and adequate rest, you'll less often fool yourself into thinking you dreamed. If you immediately start writing when you wake up, you'll fool yourself into thinking you have the most elaborate and profound dreams ever, although you'll code this as remembering.

Dreams are so insubstantial that we very recently believed that everybody dreamed in black and white, and that dreaming in color was a sign of mental illness. This is a belief that faded completely and quickly alongside the rise of color tv and film. The implications of this are pretty devastating. People themselves believed they only dreamed in black and white, and later largely forgot that this was their experience.

https://www.nytimes.com/2008/12/02/health/02real.html

Why Did We Think We Dreamed in Black and White?

http://www.faculty.ucr.edu/~eschwitz/SchwitzAbs/DreamB&W.htm

Media Influences How We Recall Our Dreams -- Do We Dream In Black And White Or Technicolor?

https://www.sciencedaily.com/releases/2002/12/021224091445.h...

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edit: so I disagree with the OP. There are no dreams, only recollections of dreams. When you look at the "dreamlike" imagery of generative AI, you're looking at something similar to what awake people construct dreams from, not dreams themselves.