That question was rhetorical...
As we so consistently see from you.
the process you describe has its limitations and is only reasonably accurate over a limited range of shooting conditions.
That's an opinion based on assumptions and a lack of experience. I've pointed out that photographers for a very, very long time have been successful in optimally exposing all nature of media without a Histogram. I fully appreciate you don't have such experience.
The process you describe is the best approach if no in-camera RAW RGB histogram is available
Clearly you've not thought about how many years photographers have been making images with optimal exposures without any Histogram, raw or otherwise. Some here, unlike you, doing so on film which is far less forgiving than digital and getting paid to do so.
The $52,000 Phase One camera is a bit out of my - and I guess many other people's - range.
Yes, I understand the limitations of amateurs. Maybe you should stick to snapshots from a phone.
By the way, don't worry about my level of experience.
I have no such worries, that's another of your assumptions, I believe based on your inability to tell us about your level of experience, provide examples of your 'serious' photography or ability to produce an optimal exposure without some kind of Histogram, your photographic experience is quite limited.
I bought my first (film) camera when I was in middle school in 1958 with money earned from my paper delivery job.
Buying something and being able to understand how use it, to use it, to show other's what use you've provided is a major difference. Some of us didn't earn money from paper delivery, we earned money as professional photographers. So yeah, you know a lot more about paper delivery than I do.
Done B/W and color film, B/W chemical darkroom printing, color slides, digital RAW shooting and digital printing.
Doing perhaps, how well, still highly questionable. One has to wonder if indeed what you say is true, how you find it so difficult to produce an optimally exposed image without a raw Histogram.