Believe it or not, I've heard a boatload of her music. Live in a rural area, like to listen to radio while driving, but there are very few stations in my immediate area (have to drive a half hour to get within range of decent programming). One of the available stations plays her songs with astonishing frequency.
There's worse stuff to listen to. Some lyrics come off as whiny / self-indulgent / narcissistic, but I don't suppose that's unusual (or ever has been within the "singer/songwriter" genre). As far as social trends, I dunno...I've been way out of touch with "pop culture", whatever that is, for decades. She seems to be making more money than God, so must be doing something right. 😄