It's easy to say if there's not an objective measure of happiness that it's not worth talking about, but each person knows when she's happier and when she wishes things were a little better. If small changes of attitude can make more happy moments than before, that benefits everyone involved.
No one can have perfect happiness, but *more* happiness is easy to come by. It doesn't cost any more than less happiness, but it's much healthier and better for the whole family and the neighbors and relatives.
photo by Gail Higgins