Earlier quoted context omitted.
It's incredibly easy to "typical mind" and expect that the normal inner experience of being human is the same for everyone else as it is for you. There's a wide variance in visual imagery. I know people who can vividly imagine things with their eyes open, find it easy, almost automatic, others who have to try, and some who can't at all. Similarly there are wide variances in how people think: some think very visually,…
What sort of "training"?
Afraid it's hard to explain, and if I'd been fully aphantasic to start (including when nearly asleep) would not have been able to make any progress.
Same type of issue as trying to explain how to move a specific muscle or unfocus your eyes