> I would bet that nearly all of the “headlights are too bright” complaints are coming from people seeing LED retrofit kits.

Disagree. The "too bright" headlights are new cars. And sedans as well as trucks SUVs.

Another big problem is that the lights are much closer to "point source" than older headlights which were 4-6" in diameter. A modern headlight is more like a 2" or smaller diameter projector lens, which is even more blinding.