I don't disagree with you. It's not a fix for the ultimate problem, which is that Apple is manufacturing devices which are not as advertised and which are not, at maximum level. brighter, and noticeably more vibrant and brilliant than previous devices. It is also clear there is great variance between different devices.
However, it is a Band-Aid, as you say, and allows me to use my device without daily frustration at the brightness level that I normally work out.
Since I ended up with an unlocked device and an extended two-year AppleCare warranty, I should be able to sell it at a good price when the next model comes out.
In the meantime, this is what my iPhone 7 Plus, on the left, looks like next to my iPhone 6 Plus, on the right. This is after that hue tweaking, and the brightness level is set to about 80% of max, rather than full max.
When done this way, to me, and I agree it's subjective, the iPhone 7 Plus now looks whiter and brighter and the iPhone 6 Plus looks like it is the one with the slightly yellow-wish cast to it.
Do I wish Apple would own up to the problem? Yes of course. And I wish that Apple would not advertise the iPhone 7 Plus as 25% brighter, and noticeably more vibrant than brilliant. It isn't.
Since Apple did refund me on my original device I had the option of opting out of the entire iPhone system and moving on to something else.
This just seem to me an OK compromise for now and I am not bothered when looking at my screen all the time.
I will certainly be extremely careful before deciding whether to buy another Apple product though. I will double and triple check return policy, and spend a lot of time comparing what else is out there.