I scored in the lowest 5% for this. Probably explains why I find it extremely difficult to form mental images.
you seem pretty smart to me… 
take care 
I don’t think it has anything to do with how smart you are. This https://www.braindecoder.com/aphantasia-newly-recognized-condition-of-a-blind-minds-eye-1236434508.html suggests it could be neurologically and/or psychologically based.
I wouldn’t mind a life without mental images. I’d suffice with all the imagery provided in the natural, waking world. 