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.
Totally agree with you on this one. Happiness is something that you can achieve on a different ways. It can be through money, sex, finding your purpose or even helping others. No matter what you do it will only lead you to happiness. Once you reach your satisfaction in life that is happiness as well.