I think, somewhere in all this, one has to read between the lines.
Young kids, while still in high school, might be terrified of mom and dad finding their secret social media profiles, but otherwise they're very active, downright sloppy, and probably not mindful of carrier-grade government tier national/international surveillance.
Are they enabling full disk encryption? Are they hardening their passwords? Are they even remotely secretive beyond their immediate social spheres?
This means it's a huge, ripe fruit, full of vital information, and eager to be plucked.
So they intend to pull as much data as possible, pre-emptively, so that there's something to mine. Just in case, later on, maybe something will eventually prove useful.
So many other age groups are too savvy now. Ruined by revelations, cautious and jaded to the fact that convenience means naked exposure of identity. But in time their ways will sunset, as they grow old, and are put out to pasture.
Those who are young now... well... it's already too late.