What is the natural science reason to wear blue light eyeglasses instead of just turning one’s computer display’s blue lights off or very low in spaces where there are no other sources of blue light than the screen the person is watching? Suppose that the person has perfect visual acuity without eyeglasses. Suppose also that all other possible protective measures achieved by the blue light eyeglasses are achieved by other means, such as by using UV filtering eyeglasses of the same shape and frame material and frame color as the blue light eyeglasses assuming that the blue light eyeglasses do have such protection. Economic, ease of use, technical savviness, time needed to configure the display or other such reasons are out of scope of the question. Other situations where there is blue light are also out of scope just as the overall harm caused by blue light.
It is my understanding that most LEDs are inherently blue, but they add phosphors that mask the appearance of that blue light, making it appear white to our eyes.
If you look at the spectrum for an LED bulb there is almost always a big spike in the blue part of the wavelength.
So, if you were to “turn off” the blue light, you would be turning off the source of the light itself. Because of that, filtering is often used to lessen that blue bump in the spectrum.