Hey, your intentions are good. But you don’t know the topic you’re writing about much at all.
Pro shooters, like me, certainly did learn how to previsualize before pressing the shutter. But I would routinely shoot dozens of rolls of film for a typical photo assigment. That’s nearly 700 photos in an afternoon. Yes, we did have to drop them off at the lab; but when we got ’em back we edited like mad, looking at b+w contact sheets and/or color slides, with a loupe and a grease pencil — right next to the waste basket.
While we were shooting film, we could preview our lighting and composition on Polaroid emulsions. We had Polaroid film backs that attached to whatever camera we used. We could make sure that the lens and shutter were working, the strobes were syncing, motion effects or stop-action were effective, etc. That’s why we called them “Paranoids,” in jest, instead of Polaroids.
BTW, I often used a 70mm film back on my Hasselblads. The width between the sprockets of each frame is exactly twice that of 35mm. And I loaded hundred-foot rolls of film in that thing.
By the way, in the Photo Districts of most major cities, there was often a bar where shooters would congregate at the end of the day to wait for the rush of film in development. Yeah sometimes we couldn’t see straight enough to edit. 😜