Continuing with the post-it-note analogy, the note can only hold a small amount of information, and so the grudge will be recorded as something simple like "fuck ___, they're an arrogant twat". So then the situation arises where you're talking to someone else and they ask "what do you think about ___?"; and so you answer "I can't stand them, they're so arrogant"; to which they respond "oh really, how so?"; and you can't give an answer, because it wasn't written on the note.
I think this ties in with memories not making you feel the relevant emotions, because the emotion you felt was also just saved as a "fact". I have found though that if I step through all the facts of an "event" and consider each "moment" along the way, that I can often generate the relevant emotion. So say I was remembering an argument, I can remember various facts about the argument and that I was angry about it, but I can't feel that anger. But if I walk through the moments, like `they said this, which made me think that, to which I rightly responded with...`, then eventually I'll start to feel angry just like I would have.
For an analogy on how I think memories are stored differently: then for non-aphantasiacs, I reckon their brain must save `memory.zip`, which contains `video, audio, smells, emotions, etc`. For a person like myself with aphantasia however, it's like I asked ChatGPT for a summary of `memory.zip`, and then I only saved the summary.
Saying that though, I do wonder about the connection between "fact based memories" and aphantasia's lack of mental imagery. Because if >50% of the usefulness of `memory.zip` is from the video, but you can't "see" the video because you aphantasia — then has your brain decided/learned to not bother saving `memory.zip` and instead just save the summary, or are all components of `memory.zip` also corrupt/unplayable?