Paul I agree completely with your logic here, the way PWM modulated LED lighting logically tricks the eyes is something I too have been concerned about for years.

Despite all that, I have probably been exposed to much more of it than average, but as yet, detect no issues, though that doesn’t mean they are not there!

After all, if our eyes are damaged to the extent we can’t see the damage done to our own skin, and our brains damaged to the extent we can’t recognise that either, it is a kind of fait accompli I think!