The argument about luminance ranges is wrong. I measure the brightness of monitors regularly as part of my job, and typical maximum luminance values are in the range of 100-500 lux. That puts you right in the steep range of the visual response (especially if you are turning it down and near a max of 100), which is natural — maximizing the slope of the neuronal response to light means that more information will be available to the brain. In fact a good monitor will be tuned according to the just-noticeable difference which aims precisely to maximize the information available according to this characteristic curve. See e.g. the DICOM standard:

https://dicom.nema.org/medical/dicom/current/output/chtml/pa...

The author's basic problem is that he knows too much about the brain and not enough about monitors.

The author goes on to argue that you should be turning your brightness down, but most people already are turning their brightness down; the blue light filter is more comfortable. He does make a reasonable case that you should be reducing green light similarly, but people prefer the incandescent effect of the flux filter to a straightforward color filter — indeed a primary design goal of these filters has been to be pleasant to look at which is why people use them.