I totally disagree. I actively strive to make myself happy. I can totally see how self help books can get some people there too. Usually what makes me happy is learning something, or doing something difficult, sometimes doing something I thought was impossible. when I find myself down, rare, but happens, I try to turn things around by accomplishing something, a distraction, or a small part of what was getting me down. Tonight, you know what made me happy? I removed a glued mirror from the wall. i had to figure it out, then did it. No broken mirror either. Yes, small and dumb, but I didn't know how to do it before, so bam, brain folded and I got one iota smarter. I freaking love that.
Still though I totally get the getting older, not caring about somebody else's rules or approval. I used to need that, and it led to an abusive relationship, circular logic, downward spiral. Now, I pretty much do things for me, and yeah, it has made me a happier person.