In my not so humble opinion there is no such thing as an overactive imagination. There ARE, however an abundance of failures of imagination
Hollyweird, for example, is full of it.
Imagination is the reason humans are top dogs on the planet. We imagine something that CAN be..then
Precisely... people visualize something, and it has a way of becoming.
I don't remember who said this, but "If the human mind can conceive of it, it likely exists-- or will exist-- somewhere," seems applicable.