A pet store is a celebration of dogs' existence and an explosion of options. About cats a pet store seems to say 'Here we couldn't think of anything else.' Cats are the Hanukkah of the animal world in this way. They are feted quietly and happily by a minority but there's only so much hoopla applicable to them.
If I'm not writing well I'm not happy. If I'm not spending enough time with my family I'm not happy. If I'm not connecting to friends or if I don't work out enough... You get the point. Everything has to be balanced. Nothing should be an extreme.