I live in an urban area, but not what I'd call a big city. There are plenty of dark areas so people do put on their brights even though it actually isn't necessary. I see people turn them on anytime there's 100ft without a streetlight. Though I've still seen some of this in major cities like LA, though I feel like the highbeam rate is lower.
Then again, I also see people turn them on in the fog and rain...
But I'm convinced it isn't a singular problem. I'm certain the LEDs are part of the issue, but not the whole story. I mean for example, improperly aligned headlights isn't as big of a problem when the lights aren't as bright. But when they are brighter then this matters a lot more. Hell, I've seen brand new vehicles be misaligned.
> [0] https://www.youtube.com/watch?v=H3pTHSIYFlg
I believe this technology is generally called adaptive headlights, and is implemented in quite a few cars. I believe some quirk of US laws (which specifies brightness at various points in the beam) actually prevents this feature from being implemented. Really sucks, because these new LED headlights are really hard to stand at night.