That's more or less what I'm getting at.
And of course, personal preference will always be the unspoken factor. I've, honestly, never found a single "default calibration" gamma setting I've liked. (Even in most modern-day films, I find "night scenes" to be annoyingly over-exposed and lacking a true sense of darkness.) And that's probably where it comes from. I don't do too much film work, but when I do any editing for post, I always hate the way reels look once we set the light levels. Always seems to bright to me...but it never is.
I'm sure experts will argue, and they'll have the data and evidence to back it up, but I rarely use any form of "professional tool" for testing color / light. The one caveat being if we're using a non-standard film speed, some weird exposure setting, or we need to match shots taken under totally different conditions (like multiple outdoor takes over multiple days). Nowadays, most of even
that stuff can be managed effectively using free software in post. (Computers
ruined film!!!
)