I'm probably a 2 on the OP's scale and I've come to believe that the only advantage it gives me is:

when i need to tell someone else where an object is in a space I can visualize. "If you're looking from the door its to your right, beside the coat rack"

otherwise it's probably easier to remember things for y'all since basically everything I think is in images or sounds. If i think of how to spell i word i am imagining an image of the word or imagining the word being written. PLUS I still have some face blindness so I can't picture people's eyes or most facial features

it's all potatoes

Apples actually

i'm maybe taking it for granted, but its not like I sit around visualising whatever I want, if you did need to know what something looked like you could always look it up anyway

I imagine dreaming could be very different? I tend to have visually very violent dreams, I wouldn't miss that, it's part of the reason I make an effort to avoid dreaming

It's much more useful for imagining novel scenarios and objects. See the mathematician in this thread who finds picturing graphs helpful