Social highly-if-not-totally weights appearance over almost all other forms of human interactions.
In my experience, photos get about 10x the likes of text-based posts. We can argue the exact amount, but we all must notice that pictures get far most attention then everything else, correct?
Given this, isn't that quite obviously the wrong type of validation people should be seeking?
The superficiality of how one looks should certainly not be weighted 10x over all other aspects of one's personality, and brings to mind the worst aspects of high-school-based in/out-group mechanics.
At it's best, it's simply welfare for the rich. People who look good already get the lion's share of "likes" and attention in the real world.
It hardly seems like a good thing it should be so online as well.