I do not think that imagination is defined logically. In fact, imagination and intuition go hand-in-hand due to the nature of our minds. When facing a complex life situation, I may not understand it however I grow the capacity to do so by thinking out-of-the-box.
It is true that imagination is harder to grasp in a busy lifestyle, and to express it in my art in a sensible manner. It is also true that defining it is hard but necessary to develop art.
The definition of art and imagination tends not to be clear cut like in a set of computer parameters. Through expression, like in a drawing or painting, I am enriched with a better understanding of myself and people and things around me.
It is hard to define imagination, and every person has a different concept of it. Handmade art, unlike AI art, is necessary for me to learn it and understand it.
Having a dreamer's attitude like this may not be ideal, but my belief is that it helps to stimulate imagination as well!