I understand that currently this is sort of a collective action problem, but I'm a bit baffled why people ever thought they needed brighter headlights in the first place. In the city, it's so bright that you don't even need headlights to see whatsoever. When cars started automatically dimming the dash via a light sensor, there was actually a period of time where I totally forgot to turn on my headlights because thing…
I don't know about the UK, but out here in France, this is wrong on most counts. Many country roads have no lines, reflective or otherwise. There will be pedestrians walking around. Also, roads are not always in tip-top shape nor clean, so you need light to be able to see.
However, I do agree that maybe extremely bright lights mounted high are a nuisance.