Why does GOD do this?

Im just going to say that believing in a higher being, such as God, is a great way to move past shit like this. It gives you an out. It works for me and might not work for you. Quite honesyly, I dont care if you believe in the devil as long as you are happy and it gives you a way to cope with the loss. Do u honestly want me to believe that the cause is because of this tragedy is because of unfortunate events? Who decides how these unfortunate events occur or who it happens to? Plus, if you really think about it, then why do we exist then? Why do we bleed when we are pricked and why do we sweat if its hot? I know your going to say its the body's way of dealing with certain problems, but what i believe is that God makes our bodies and we are the ones that control them. If something bad happens to them, then for the most part, we are responsible. But for a persons heart to just stop, when they dont do drugs, aren't overweight and workout regularly, is a sign that someone or something is out there fucking with us.