I agree for sleep. I prefer them because they focus better for me.

Blue creates a halo around letters that is distracting with my declining vision.

Also, Blue fluorescent OLED are ~50% less efficient than R/G phosphorescent OLED so you can reduce screen power consumption of a full white page by almost 30% using such a filter. That in turn might be 30% of active device power consumption (for a total of almost 10% in battery life during active operation). Ignoring that they also tend to burn out more quickly, since tandem blue has become fairly mainstream.

Many more reasons for these "filters", if you don't mind the white balance shift and reduced color gamut.