It’s one of those things where I didn’t know until I was in my 30s and figured imagining things meant thinking about them and not actually seeing them.
If you don’t know what it’s like you can’t miss something, ya know? But there are experiments that are trying to give visualisations to aphantasia folk. I’m not sure I’d try it because then I would be missing something.
But, big pro: I can see absolute horrific stuff and I’ll never be able to reimagine it. Describe a vile, nasty car wreck? Can’t see it but I know it’s bad. It has weird benefits