Two LEDs placed properly in the bulb structure will mimic the 360 degree dispersion pattern of an OEM bulb very closely. When I switched to LED bulbs I test fit one side and left the OEM bulb in the other. The dispersal pattern of the two bulbs were identical. The horizontal upper cutt off point was the same. As I said previously, it is important to buy a quality bulb that places the LEDs properly.
I have been running LEDs for almost two years. I live in a congested area regarding traffic. I can't recall being flashed by oncoming traffic unless I left the high beams on by accident. There are many cars with LED lights in my area. OEM and otherwise. I don't find OEM or aftermarket bulbs annoying except for those using the ultra cool, very blue, bulbs. If I were getting flashed by oncoming traffic I would either find a better LED bulb or go back to OEM ones. I would like to find a set of quality LEDs that have a 5k temperature rating but haven't found any so far. I think 5k bulbs would provide better visibility. For some reason most are 6k-6.5k.
1) If the light is brighter or colder color temperature, you could have the exact same dispersion pattern and it's still a problem.
2) No quality bulb changes this. It's still illegal, and more blinding to other drivers to whatever extent it improves your vision. Even more so, because the cold color temperature tricks the brain into thinking it is more usable light because of the glare even to the driver, when it is less usable to the driver than a warmer color temp at same lumens and beam pattern.
3) Not being flashed is not proof of anything. I constantly see illegal glaring headlight and do not flash them because there is no point, knowing they have illegal headlights and their only recourse would be to entirely shut their headlights off! Please reads this #3 several times because I often see this false argument where people don't GET IT, that if you are being blinded and struggling to see to drive, the last thing most people would do is think "oh, instead of trying to SEE, I'll make an effort to flash this other vehicle instead". No! If you are blinded, any responsible driver puts 100% of their attention into trying to drive instead.
4) Illegal, and blinding others, and you've been given notice that they blind others. What else is there to say? It's like rationalizing an armed bank robbery, claiming nobody complained about it while at gunpoint, nobody was hurt because you didn't shoot them plus FDIC covers this, that it just benefits you with no drawbacks otherwise, which of course is not true. I'd rather people robbed banks because frankly, it impacts me less.
5) If you state you'd "like" to get 5K temp lights but get them anyway at 6K5 temp, that's not a consolation to anyone else blinded by them. It's more a sign that the manufacture only cared about cost and not anything else, to try to produce most lumens possible from their design budget. Plus, even 5K temp is too high. The higher the temp, the more glaring and less useful the perceivable light is to the driver, which was the point in the first place, no? High CRI and lower color temp provides the best acuity with least glare to everyone.
Do you trust the Chinese with your life? It seems like you're just stating you can't resist buying an illegal product that causes problems then rationalize it by downplaying every reason why. If nothing else, there's the lower reliability. Despite the BS claims by LED retrofit manufacturers, none last remotely close to as long as a long life incan bulb.
There is no valid reason to use them on public roads.