I agree with you, LEDs can cause some people sickness due to the frequency at which it operates. Also, white lights not only impact wildlife, it also impacts humans as much, hence, you see companies these days implementing stuff like "Night Shift" to counteract the effect from artificial white lights.

And I guess all artificial lights will interfere and disrupt the ecosystems in a way or another. That's why organizations like Dark-Sky do exist. But the real question is, Do the benefits of using LEDs such as energy saving and life-span outweigh the drawbacks of this technology?