Yeah! That is why it comes as such a shock – everyone assumes that how they use their mental abilities is how everyone uses them. Some personal examples include that realization that other people can actually listen to a song from beginning to end (I can usually make it about 8 bars in before my mind goes elsewhere. I live in a eternal now since I do not have autobiographical memory so can not use past experience to predict outcomes (Severely Deficient Autobiographical Memory – SDAM), My neurologist had not heard of either aphantasia or SDAM – he asked how do I find my keys, uh – put them in a bowl by the door every time I come home.
I did a lot of acid in the ’70s and have no idea now how I perceived the hallucinations; I have action/adventure dreams but do not know if they are visual or not.