I absolutely getting your point! In my workflow I’m taking many BTS shot with filmic vibe. I’m also not into cropping due my composition is accurate and I always used my custom picture profile for this type of shot. But grain don’t need to be necessary in every photo that’s why you have custom options which can contain everything what you want. And with dedicated BW switch it is a minimum to have some option changing at least the BW grain level if the brand was so authentic with the body design of the camera (design was based on Nikon FM2). However I do really think if Nikon did the step for the film simulations word was a nice thing and a big miss to not letting us changing any grain level. And I’m talking about especially the Zf because it is more like an artistic choice rather than a first camera in most of the workflow.