I don't agree that only by reading "studies about biases in affective forecasting" can you be good at predicting what makes you happy.

I know if I eat good food with good friends or family I'll be happy. I've never read that in a study, but it works every single time with me. I know plenty of other ways too.

As you say, you are echoing a principle (which verges on a platitude), but not adding a lot to the discussion unless we are willing to trust your expertise without examples. Had you combined it with your more detailed followup, I wouldn't have felt this way.

I'm not really defending my vote, just explaining my thought process since you were asking. If it helps, I've evened out my actions up by upvoting this question.