It seems dreams are not affected by aphantasia. Reading "in your head" does not require hearing "your voice" while you do that. I can draw perfectly well, but

It seems dreams are not affected by aphantasia. Reading "in your head" does not require hearing "your voice" while you do that. I can draw perfectly well, but when it comes to drawing things I've seen, I'll be drawing from my memory of observation of features ("his eyes were close together"), not from the image in my head. All of your other examples are similar: I never assumed that everyone can visualize exactly the same or that the term "photographic memory" refers to majority of the people: I rather assumed that this was out of the ordinary (and it is, just on the other end of the curve). I've always had trouble with following flow-charts: they were never helpful for me. But I realised that most people like them, and that it's likely their brains are wired slightly differently. So in short, I could notice that there are some special things about my brain, but I did not know that this might be "aphantasia" (I was thinking maybe that's why I was so good at math and resolving complex programming problems). I've noticed other things as well which I don't know the name for or if it's only a symptom of a wider difference in processing (eg. I have a hard time separating multiple voices when they are talking at the same time, even when I notice others can easily do it). I, for instance, don't find it extraordinarily difficult to believe that you find it implausible that adults would only learn about a fringe "condition" like this (which doesn't stop them from any of the daily human activities) later in life, but I find it extremely unreasonable! Because human brains are extraordinarily complex beasts, and we understand only a miniscule part of them.