This was an interesting read, but it's only discussing blue light filters as they affect melatonin and thus sleep cycle. It doesn't say anything about other reasons to use them, which for me are:

• Blue LED light is linked to long term macular degeneration, it may also have negative effects on the retina in the shorter term.^[https://en.wikipedia.org/wiki/Biological_effects_of_high-energy_visible_light#Blue_LED_light_hazard] It's not completely clear to me whether these effects would also be basically unhindered by a blue light filter, as the article describes; it gives me no reason to think they would but I'm not a neuroscientist.
• When I'm already using a dark theme with my screen at minimal brightness (as suggested by the article), using a filter lowers the total luminance even further (as suggested by the article).
• It feels less straining on my eyes; maybe that's purely psychological but hey I'll take it.
• It's cozy :3

Given this the article title seems sliiiightly grandiose, but perhaps most people are really only in it for the melatonin thing.