I would normally agree with you on this. That is the reason I do not run LED headlights. However, I was pleasantly surprised by the light output of the light I installed. Not only is it only 10watts. It can be dimmed down and the light color can be adjusted away from that harsh blue/white led light.Two of the main reasons I do not use LED lights as much as possible is due to two things - they are too bright and they hurt my eyes.
Also, several studies have now come to light showing that LED lights are irreparably damaging the retina in eyes. They also disturb biological and sleep rhythms. The same goes for those in cellphones.