“why don’t they do it?”
It’s a nasty problem for me. Maybe younger people’s eyes don’t have the brightness smeared across their retinas.
I think the blue-white-ness of the LED lights makes the problem worse. Don’t warmer lights scatter less?
Well, there's another issue with these things that chaps me. The human eye has best sensitivity and contrast discrimination in the yellow part of the spectrum. These LEDs put way too much of their energy out at wavelengths where the eye doesn't want it.