Secondly, and just as importantly, it creates an anchor: You bind your expectations of happiness and contentment onto something so singular that you often forget that other things in your life are capable of adding just as much joy to your experience than the thing you’re so fixated on
All Goals in Life Are Problematic — Except One
Zat Rana

This is double-edged. Sometimes we need this anchors, special at hard times! If your present life is full of uncertainty and unfortunate events this anchors will keep your head straight, no matter all the chaos around.