It could also be used for more nefarious reasons like disinformation campaigns though... it will be interesting to see what the next few years have in store
You don't need good-looking pictures for propaganda. Old people (the main targets) believe literally anything they see on Facebook, especially if it confirms their priors aka fits their worldview, and prefer it to look bad because that's more authentic. For anyone else, the point is to make them disbelieve everything, not to believe you specifically.