tbh almost every time I see a system settings panel or a program that lets you reduce blue light on a schedule, it’s always accompanied with a description that sounds like “reducing blue light may help you sleep better”. I don’t think there are many people touting it as some sort of scientific neurological thing, it’s just that many users have a personal preference for reduced blue light at nighttime, and the developers want to accommodate that preference. Not everything has to be backed up by scientific research, sometimes people just like things.