I suppose if being happy and functional is your goal, it makes sense to do whatever you can to improve your chances. Personally, I prefer to experience reality and find truth even if it isn't happy or beneficial. I never hear them give advice that makes people unhappy or ask people to sacrifice for others. Furthermore, fundamental views and values I hold are likely very different from any therapist, so they can't qualify to advice me (and many others). Based on what I know about human nature, it's pretty damn scary how much people trust therapists.
Check out century of the self, a documentary I found on HN actually that documens how freudian psychology and modern marketing and capitalism aligned and worked together in the 20th century to create the world we are in today: