The problem isn't really the brightness, it's that they don't bother aiming them.

They come with most cars. Its not typically a choice.

I think that’s yellow reflective tape already, though a tasteful border wouldn’t go amiss.

SE Asia was brutal when I went there. India had all nice old yellow lights and sometimes light bulbs and sometimes oil lamps or candles to light their way. That was nice, and constantly terrifying.

LEDs are so point source and intense that any misalignment, which is very common, is going to be an issue. Plus they blind you much more when a car's nose is elevated relative to you. Put HID or LED lights on trucks and they are always in your face, and it feels like 50% of the vehicles are massive trucks.

Also the increasing height of lights, even low beams travel fucking long

Yeah, but the LEDs really.... highlight the situation.

To be fair, depending on the housing, alignment is nearly impossible. Many housings are simply not designed to have a sharp cut off. As far as I'm concerned, LEDs should only be allowed in projector housings with projector lenses. Those are the ones that have a damn near razor blade level of light cutoff, so when you aim them to just below the windshield level of most vehicles, it's not going to blind them at all.

That is what I have done with my car, I have LEDs brighter than the sun, but I have them in projector housings with projector lenses, and I have them aimed to be below the windshield level of a typical sedan, not a stupid SUV or truck. So nobody ever flashes me or gets annoyed and I have tested by having a friend Drive towards me on a road in the car while I am in a different car

It has the added benefit of my high beams are still mostly road level rather than up in the trees like many peoples so for like a mile in front of me it is just daytime which is very helpful out where I live in the middle of absolute nowhere rural where streetlights are just a myth and the deer are plentiful.

It's super easy to adjust in most cars that don't do it automatically. There is usually a slot near the lights and you use a philips or flat screw driver and turn the adjustment nut either up or down depending on need. Instructions are in the manual or you can look it up online for every vehicle I've owned.

There is an exact method but generally line the car up facing and super close to a wall, turn the lights on, the center of the beam should be about 2-3 inches below the height of your headlights. If you have space the beam should hit the ground 7.5m or about 25 ft from where your car is parked.

A common issue in my hick town is people lifting vehicles and never adjusting the light angle. Any time you put bigger tires on a car or lift the body you should adjust the lights.

Edit: I just wanted to add, if you get brights flashed at you a lot it's time to adjust your lights.