Fair enough. And again, I am not disputing that there is a problem with Apples devices, or that PWM impacts some (or many) people.
Would be interesting to see a detailed breakdown of the different PWM or display scheme among the Samsung panels out there by a scientific firm such as Displaymate or similar. I have been reading about PWM since my first Nexus phone and don't dispute that it impacts some people. I am curious if the PWM effect some automakers use on their LED marker and taillights also impact effected people.
FWIW, Grumpy Mom and I both have a Pixel 2, and have shared both praise and gripes about that device in the Alternatives area for about a year now.
Overall, it sucks that this is an issue for so many, and I do hope Apple looks into a resolution since they are so invested in health, and accessibility.
The problem with an issue like this is, where do you begin? “Headache” is not measurable, so it’s difficult to understand what is the actual root-cause, measure it, and improve it.