Why would you think calling one bullshit is "offensive" and not the other? You realize that this "gray" scale that you claim is as unscientific as it gets, right? After all, it worked for me! And I hear that it works for my friends! How can homeopathy/blue light filters/whatever-ritual-you-like-today not work? How can there not be a teapot on the sky?
If the problem is with the word "bullshit", call it pseudo-scientific, but it is almost the same thing.
Tomorrow there could be some evidence of an effect shown in the opposite direction (e.g. blue light filters _harming_ sleep quality*, or performance the day after, or whatever) and you would be as skeptical as with claims of no effect, if not more. See the recent article of white noise in HN and how it was met in the comments.
* Because of people (or worse, software) turning their screens' brightness up to compensate, which I already read an article about long time ago...