Fair enough. "All" was a poor choice of words. I would be the last (more hyperbole) person to tell anyone how to live their life.
Also, I failed to mention why I replied to the parent post: the mention of moderation. I think if you are listening to how you're feeling, you can (one can) tell when a life strategy isn't working. The important things in life will make their demands known.
No, we are not all striving to have more happiness (although some people surely are). So long as you don't circularly define happiness as "that feeling you get when you accomplish your goals", then most people have at least some goals besides happiness, and some of us explicitly advocate that many or most goals should not be happiness related.