This is a fairly narrow, and personal definition of art.
If I take a can of paint and fling it at a canvas emphatically, with an intent of passion it will create something I might have imagined, but it is not an exact replica of an image in my mind. This is still art.
Likewise if I lack the motor function to throw that can of paint, so instead ask an AI to render for me “A thrown can of paint against a white canvas, angry, blood red, force, extreme emotion”, and it renders something comparible to the above - have I not used my imagination and creativity to create something comparible?
If not, why not?
Without my prompt, my human creativity, that image would not exist - it didn’t will itself into existance - it is a manifestation of my creativity.
Apologies btw that was a bit inflamatory, I didn’t mean that as an insult directed at you, it’s more the position that folks seem to adopt when tackling this subject. It’s hard to draw lines around creativity without being a bit pompous, to be fair.