Blame the US government for glaringly bright headlights. My car has 96 individually controllable LEDs with diffraction grating and motorized lenses. It can selectively turn off individual pixels to prevent blinding oncoming drivers and pedestrians.... BUT... the US government forbids those advanced features be enabled.
Some 1960s law says you can only have a high beam and low beam. Both are based on 1960s incandescent sealed-beam bulbs. So now that lighting tech and design has come up with highly-focused point-source headlights, the government is stuck in 1960s. and the clipboard warriors won't budge. Trust me, I tried.
I mean, we could also go a bit more low-tech and do as the Germans do. They've had headlights designed to not blind oncoming traffic - while maintaining visibility at very high speeds - for decades. You get a lot of light, because it's all going on the road where it's needed, and it keeps it out of the eyes of oncoming traffic.
German lighting regulations are awesome, and even apply to bicycle lights (another area in the U.S. FAMOUS for being horrifyingly blinding to oncoming traffic).
I have a Busch & Müller bicycle light that puts out quite a bit of light, and I have lost count of the amount of oncoming cyclists and joggers that have shrieked in anticipation of being blinded, only to go, "Oooooh!" and then shout at me to ask what my light is, why is it so amazing, and where can they get one, haha.
Just normal, simple reflectors with a cutoff on what comes out near the top of the housing.
I'd argue most of the issues in the U.S. are unfortunately a byproduct of the modern culture.
In the U.S., absolutely NO ONE gets their headlights professionally adjusted. The machines to do so are pretty expensive, and most dealers don't even have them. But, if you get a chance to have them actually adjusted, it makes a huge difference. I know this is actually slightly easier to do with modern housings, but - again - no one bothers to get this done. I see cars CONSTANTLY driving around with their lights pointed in really goofy directions.
There's also the idiots using fog lights without fog...seemingly oblivious to the fact that fog lights without fog are absolutely awful about blinding oncoming traffic.
And finally, in the U.S., our cars are intentionally made extra big and tall so they create the psychological effect that people feel they're getting more value for dropping $60-80k on their vehicle. Car companies are well aware that the same exact vehicle, in both a car and a "larger" SUV form, can net a good 30% higher price for the SUV version, as it looks bigger. Trucks and SUVs are the primary source of profits for automakers in the U.S., as it's easy to inflate prices without people getting too upset (obviously, conspicuous consumption plays into this). It's the GIANT BAG of potato chips (full of air), in the automobile form. For taller vehicles, proper orientation of the headlights is EXTRA important.
That means we tend to have a lot more vehicles on the road that really NEED to have their lights aimed properly, yet, do not have them aimed properly, who then turn on their fog lights and brights to compensate, and wonder why everyone is blinded.
As a last thought, the U.S. population is aging, and it's something like you need twice as much light at age 50 to see as someone 25 years old, so it's REALLY EASY to sell expensive cars to older people by putting in lights that blind everyone on the road - so the rugged individualist American consumer can see better.
So yes, the U.S. COULD have better regulations (Germany has them), but I think a lot of the issue is more fundamental to America's "Me First" culture; people do not care if they are blinding others, so long as they perceive they are gaining an advantage (which, unfortunately, is a more recent development in our culture).
