You actually find peoples' FB pages insightful? I mean, most people don't post terribly deep info about themselves on their FB page. Pictures of their kids playing or links to videos or articles they think are funny, maybe a bit about a vacation or complaints about a bad day at work. But deep, reflective insights about people are few and far between on FB. I suspect therapists know that already and most would not be interested. Nothing there would come close to the insight they would gain in session about things none of us would ever begin to post on our FB page.