It's also very common, and very fallacious to think that a cutoff is the be-all, end-all of a good beam pattern and headlamp performance.
The reason people buy "bright" LEDs is they fail to realize that improving headlamp performance doesn't mean throwing random aftermarket parts at the headlamp.
The art of car diagnostics has been lost upon the younger generation. Cars come equipped with long-life halogen bulbs; a mere glance at the bulb you pull out a new car will clue you into that fact, because the bulb will have "LL" (long life) or "L+" (life plus) or "L" (life) printed on it. Long life bulbs trade off luminance and brightness for life. The logical upgrade would be getting a bulb that performs the opposite tradeoff--not throwing questionable aftermarket parts at the car and then, without any knowledge or testing equipment, self-certifying that the car still meets federal safety standards.
I replaced the weak halogens with LEDs that have an adequate cutoff pattern. I made sure to test it so it wasn't blinding oncoming traffic, but I doubt most drivers are even aware of the concept of headlight cutoff patterns, much less are aware they're adjustable.
The reason people buy bright LEDs is because the headlights that come in their car suck. If you want people to stop blinding other drivers, make projector headlights mandatory, and start incentivizing automakers to provide LEDs as an upgrade.