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.
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.