I believe in evolution and that our sole purpose is to survive. In other words, the phrase "survival of the fittest" is our motto in life and is our only purpose in living. Those with anhedonia and depression as well as other major problems are the most unfit for survival (the weakest) while those with nice happy lives are the most fit for survival (the strongest) and that is what makes these happy people superior. We are nothing special or strong for having suffered and for moving forward in life despite our suffering because we would still be unfit for survival (weak). However, pleasure is the only strength in life and all other aspects of you as a human being (your thoughts, knowledge, and attitude in moving forward in life), these are not strengths at all. They are nothing more than biological robotic functions that a highly intelligent and well-designed biological robot from the future that has no ability to love or experience pleasure would possess. So people with anhedonia and depression would still be nothing more than inferior biological robots even with the attitude of moving forward in life, in helping others, and in doing great things in their lives.