Your second point is an interesting discussion. You are correct that in its infancy, psychology was criticized for claiming to be a scientific field and not living up to that assertion by performing quality research. I believe that this question has been put to rest as the rigors of publishing in psychology require randomized, double-blind, placebo controlled trials.
Answer: In John 10:10, Jesus said, “The thief does not come except to steal, and to kill, and to destroy. I have come that they may have life, and that they may have it more abundantly.” Unlike a thief, the Lord Jesus does not come for selfish reasons. He comes to give, not to get. He comes that people may have life in Him that is meaningful, purposeful, joyful, and eternal. We receive this abundant life the moment we accept Him as our Savior.
It’s quite clear that success has nothing to do with our initial set of circumstances. Some of the most poor and disadvantaged people in the world have achieved the greatest successes of all time. Oprah Winfrey was born to a single mother on welfare and was physically and sexually abused as a child. J.K. Rowling was divorced, had a daughter, and was living on government assistance before publishing the first book in the Harry Potter series.