"If a car is in an accident due to another car’s excessive glare, for instance, the offending vehicle that caused the situation would likely never know it and just keep driving. The inability to clinically prove the dangers of headlight glare is at the heart of the issue." https://www.theringer.com/2024/12/03/tech/headlight-brightness-cars-accidents such a classic example of "if you're increasing an easily measured desirable metric while causing a harm that's hard to measure, you can get away with it for years or even decades"
@jplebreton part of the problem is that many countries are still setting limits and guidelines in radiant units (e.g. W/sr), not luminous units (e.g. cd), so manufacturers can increase the perceived brightness at the exact same radiant flux by shifting to the bluer (higher-CT) end of the Planckian locus. super annoying.