All of your "facts" are driven from your own ignorant assumptions. The man who does this work owns his own shop in Texas and has already done MANY retrofits in much harder oem headlights than a z's and yes, they're documented. If you feel the need to babble more ridiculous skepticism feel free to email me, I'll set you straight ;)
BTW, I think greatly improving your sight of the road and therefore safety during night driving is all but "foolish".