I'm a very visual person. My mother used to make fun of me for reading comics beyond age 14, or going for illustrated material in general, but it is how I work. I don't do "Blah blah blah", neither in input, nor output. It's my pet peeve about working at a mostly male-staffed shop and they announce that they're gonna "take a shit". And I'm seeing that process. I'm seeing my boss, and that handsome new boss, and ugh..........
So while I do fish for the right words often since English isn't my first language, most of the things I write, I "observe" in my head-movie. Though it's a bit of a pain to imagine things right sometimes: I may forget that the town is paved, not sprinkled over dust roads like some Iranian countryside bumblef*ck village, I may have trouble seeing the MC's features correctly (his appearance is 1:1 based on a person I know, so I hate the cheekbones being off in my imagination), but overall, I visualize it.
But as kuwisdelu wrote, having trouble visualizing it doesn't make it feel less real. After all, I also don't always remember the faces and settings of real events and people 100% correctly. Like, when I admire, respect, or have a crush on a man, then he's very tall in my mind's eye. When I lose that feeling or get disappointed, he shrinks below my height. Only when I have a positive, but kind of neutral/platonic relationship with him, do I remember him my own size.
But that's what makes it fun to me. Movies, inside my head or before my eyes, are more entertaining and emotionally engaging to me than the written word. If I had the patience, I would be drawing comics, not writing.