He did not call you ignorant.
He said the argument that you can successfully/satisfactorily and legally install an arc discharge light source into a motorcycle is fully bebunked.
If the objective is to get maximum seeing distance, and then you install a light source that is 2-3x as bright, and then you lower the aim. You have just screwed yourself because your pupils will constrict and you have no distance vision.
Sure single track vehicles are legally allowed to have ECE headlights, but if you put an HID where an H4 is supposed to go, that is just an incredibly asinine move, it doesn't matter if group think wants to believe that it isn't.
Motorcycle really shouldn't have HID headlights. Motorcycles have a terrible sprung to unsprung weight ratio. The wheelbase of most motorcycles is usually less than five feet.
How many motorcycles have dynamic auto leveling headlights? (or self leveling suspension)
How many motorcycle projector headlights have the cutoff mounted on a gimbal, so that if you really lean into a corner, say at 45 degrees, the cutoff maintains a neutral horizon?
Motorcycles should be required to have redundancy in their low beams.
http://www.triumph.co.uk/images/Sprint_gallery_pop_1_2008.jpg (3x H7)
http://www.sportrider.com/bikes/146_0204_2002_honda_vrf800_interceptor/photo_07.html
2 lows & 2 highs. (h4 low, H7 high. Yeah it is Honda, that explains why they don't have 4xH7s)
and I still don't condone motorcycle highbeam headlight modulators.