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

If OP is attempting a 3-2-1 Backup scheme, this is an irrelevant argument.

OP wants to store a backup in a different physical location while trusting that it won’t be used to train AI. They are looking for services that can satisfy that.

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.

Of course a 6" screen doesn’t produce as much as a ball of nuclear fire

But that ball of fire isn’t 12 inches from your face at midnight. And, the majority of blue light filter use is targeting sleep quality. A good portion of this comes down to cumulative exposure time. The best solution is to just not look at screens after a certain hour, but no one wants to do that.

I play disc golf.

Sometimes finding my disc is a safari

The answer to your question is yes