I'm not sure about "HID headlights are NOT the problem." I don't know enough about them to accept or reject that conclusion as presented, but again, it seems to me that subtleties are important... Allow me to play devil's advociate. Non-level roads and bumps come into play (how does the car know about the sightline of those in front of you- both oncoming and travelling the same direction - when the road is not level? Does it take such things into account and dynamically adjust -- if no, then their brightness can indeed be a problem. You are basically saying "Yes, they are very bright, but it's not a problem because they are meant to be aimed below other driver's eyes." Unless cars with these very bright headlights are adjusting the aim and cutoff dynamically based on the position of other driver's eyes, which changes on non-level roads, and taking hills and bumps into account, then the solutions of how they are aimed and cutoff only really work properly under certain driving conditions. I, as devil's advocate, argue that these lights are too bright and the mitigation measures are not robust enough to realistic driving scenarios. Those measures are designed to help with not blinding other drivers, because the lights are very bright, but the solutions to dealing with the brightness need improvement to say those lights are not a problem.), vehicle height comes into play (if certain pickup trucks pull up behind a car of lower height or comes up towards me cresting a hill, their lights may be aimed downward right into my vehicle and / or mirrors impacting my ability to see), as do people who adjust other aspects of their vehicles in some way without also adjusting the headlights (e.g. using a leveling kit on your pickup truck without adjust the headlights downward).

Seriously, I don't know whether you are right or wrong that they are not a problem, but I am wary to accept that the measures taken to minimize shining in other driver's eyes (aim downward and use a cutoff) solve all the issues associated with their intense brightness. They are very bright and measures have to be taken to account for that, and I'm not yet sold that aiming downwards and using a cutoff are robust to real driving situations accept on level, nonbumpy roads with cars that haven't been modified and are not tall / close enough to me that their downward aim means they are pointing directly into my eyes & mirrors.