Blue light has a documented effect on our circadian rhythm and melatonin production. It’s been studied quite a bit. I’m sure mental overstimulation is a component, but it absolutely is not the whole story.
In Western society, there is a big focus on silver bullet solutions because people don’t want to address issues in a holistic way. Thus, you have blue light filters instead of turning the screen off.
These are incredible for hiking, hunting, etc
One alone won’t be able to do much but if you need to connect a few people in a rural area it’s amazing.
My only hope is that waterproof models become more available