I have visual aphantasia but not aphantasia of any other senses, so I can assure you it's not a semantic misunderstanding. I play piano and can hear tunes in my head and use what I hear to play it out on the piano, like playing by ear but without actual sound. And I simply don't have this same ability with visualization.

However, I do visualize in my dreams, so from my own experience, I suspect that aphantasia is not a complete inability to visualize, but rather an inability to visualize intentionally. When I'm very sleep deprived or on psychedelics, my ability to conjure mental images changes, not necessarily to full visualization, but at higher levels than in normal life.