My ex made me realize I had this a few years ago. It was like everyone here says, the literallity of seeing things in my mind escaped me. I'd always assumed sayings like counting sheep were just metaphorical.

It kind of goes to show you how moritifyingly behind we are in understanding and articulating our cognition. Autism was right up there until a few years ago. I believe there's a lot we still have to open up to ourselves. I'm not religious, but maybe exploration of the self and mind is more warranted than our society currently expresses. Of course, it's easy to slip into quackery, but I almost wonder if it'd be worth a few more nut jobs if we collectively self analyzed more deeply. Maybe there's a lot out there to our happiness and evolution were missing out on if it's taken this long to realize there's a sizeable number of people who can't sense internally.

Funny side note - despite having Aphantasia I have two degrees in physics. I could never follow in class (literally couldn't imagine what the prof was trying to hand model) and animated gifs made everything instantly understandable. The agony I felt in those programs seemed a little more justified after I was told about Aphantasia. A little.