Why would a hiking selfie be weird to take? I used to be an avid family hiker and we always brought along a camera to take pictures of the surrounding area and selfies. This is common human behavior as I often see hiking selfies from friends on my facebook feed. I grew up in a National Forest covered with woods, mountains, bluffs, rivers, streams, and waterfalls. You would expect to see plenty of hiking selfies from someone in my area when the posted on facebook that they were going on a hike.
It wasn't weird to me. But some folks posting thought it had sinister meaning. Or that it was supposed to show TS being a good mom. Given what happened, I can see why people thought that. But to evaluate the motivation behind the photos
including the sleeping one I'd like to know more about how often photos were taken by the family. Some people DO seem almost OCD about taking photos, taking 100's every single week of the year now that we use digital not film cameras. If that was the case here, then I think it's risky to read too much into only a couple of those photos.
JMO