I get my ideas completely from inner monologue. But my ideas are mostly related to developing automated systems etc, I don't really need imagery for that, although I think I need to sense some sort of graphs or how things work together on the higher level.

I write a lot, including fiction, and I feel my aphantasia probably shapes what I like to read and write in ways I wasn't aware of (before realising aphantasia was a thing, and that I have it), but it doesn't stop me either.

E.g. when reading I tend to skim over writing that spends a lot of time describing the visual appearance of things unless the words themselves are beautiful to me, because no matter how well written the descriptions are, they don't achieve anything for me beyond the shape of the prose itself.

(I love the structure and flow of language, so there are absolutely moments I find myself reading visual descriptions because of the descriptions themselves)

When writing, I prefer to write relatively sparse prose that focuses on how things works and relates to each other, and dialogue, rather than trying to evoke imagery that I can't see for myself when reading the text back.

yeah, I had a similar realization as an adult that not everybody else talks to themselves inside their head