I do read books, and, if visualizers were real, I'd expect that my enjoyment of books would be naturally greater. The narrative format of a book is similar to how I think and perceive of reality - as words. Books are more like a native format for thoughts and experiences than I'd expect them to be for visual minds.
I don't think I ever said I can't imagine what it would be like to have visuals in my mental experience. I'm familiar with images and vision and expect it would be like being able to "see" things without seeing them or calling images up on a screen. That people who claim to be able to visualize don't seem to have that ability makes me doubt their claims. (see: bicycle example)
I do have an imagination too and agree it is a real and powerful ability. I just doubt that other people actually have visual imagery in their imaginations.