Almost all of the things that drive us and govern our lives are based entirely on the approval of other humans or our biological needs; the approval of our parents, peer pressure, love, sex, academic grades, job, income, social/political/professional standing, or religion and the idea of deities, and even the worth/value of our contribution to society..

Would any of these matter at all to a different intelligent species? Say, a hypothetical species without any gender. Poof. More than half of human values and aspirations become meaningless.

"Happiness" that is to last for more than a fleeting moment depends entirely on what we choose to believe. That is some pretty flimsy grounds.