I find this VERY hard to believe. Where did you get this information?
Son, School is in session.
http://bfy.tw/1AZT
And if you don't believe all those search results, if you paid attention to previous posts, we have pictures:
LHD (US and most of the world):
See that bump off to the right (our passenger side)? It's to help illuminate roadside signs that are typically higher than your normal headlight beam cutoff.
Now, compare that to the same headlights, but in the RHD version used in the UK, Japan, (and most other former British commonwealth countries):
See how that bump is on their passenger side, to the
left? Same reason, just different traffic directions.
Now, can you understand how RHD headlights on a LHD vehicle can blind oncoming drivers? I hope so.
*drops mic*