For me the “pictures” in my mind are very diffuse and can’t hold much complexity. It’s certainly very different from clear actual seeing with your eyes. I also have a hard time remembering faces if I don’t see them frequently. But I wouldn’t ever say that I can’t/don’t picture things in my mind. While there’s probably a spectrum in how clear people’s mind’s eyes are, I wonder if there’s also a difference in how people conceptualize their internal perceptions. I.e., I could conceivably imagine that someone with the same internal picturing capabilities as myself would deny that it constitutes “seeing” something in their mind.