Providing you recall them—which many people don’t—because it’s not as if we don’t have dreams.
A third of the time we spend awake is spent sleeping, and at least a quarter of that time is spent dreaming. Rapid Eye Movement (REM) sleep is when the majority of our dreaming takes place.
Watch This Video to Know More About What Causes You to Forget Dreams?
We need additional research before we can make any firm conclusions since we just know the very beginning of what there is to know about dreams.
Although dreams are fascinating phenomena, the scientific world is still quite uncertain about them.