This is sparking what I think is a really good discussion, and lesson that everyone can stand to be reminded of from time to time.
There are things in life that you can control, and things that you can't. Nothing productive whatsoever is gained from worrying and anguishing over the things you can't control, even though so many of us fall victim to this every single day. For some of us it can be a daily battle. But, as others have said better than me, once you do find a way to try and let things beyond your control go, your stress level goes way down, and life becomes a little easier to enjoy