for me its a yes! the main goal of human is happiness whatever human wanted to reach it towards to his/her happiness.
For example why do people want to work? because they want a better life, and if they reach better life they also reach their happiness.
So for you what is the main goal of human?
I believe yes, the main goal of human is to be happy. We are setting goals and achieve it while we live because those goals would provide us a complete happiness. We are living to reach and get what we want because having what we aim for will definitely make us happy in life. Reaching our purpose and living a life without too much pain and a lighter living will provide us an internal happiness and joy.