(Psychological / emotional perspective)
At times, our own inhibitions and anxieties cannot be faced unless they are first given tangible forms in dreams.
In allowing ourselves a visual representation, these anxieties can become more manageable. What has seemed to be a huge obstacle in dreams can be consciously made smaller until we feel capable of dealing with it.
For example, a patch of weeds in dreams might be cut back until we can continue on our way.