I had a friend who was big into tabletop role-playing games but also apparently could not visualize anything at all inside his head. which is weird... because visualizing stuff inside your head is what makes this hobby work. how do you navigate a fictional physical space or imagine other characters in your role-playing game if you can't visualize anything?
that's always puzzled me since I learned about it. he's a nice, friendly, humble guy too, so it's not like he was trying to get attention or appear special. maybe he was just a real-life NPC.