I would point out that quantum mechanics are merely a model for subatomic physics and attempts to apply the theory to human behavior and human constructs such as "chance" are nonsensical.

As far as whether anything in the macrocosm is random, we dont need quantum mechanics, we just need to observe nature and use some logic. If a tree is growing, there is a chance that it will bend one way or anotehr. There is a chance it will rain, a chance that a deer will run in front of your car. What is chance but things that happen without any way to know that they will from one single human perspective? Only for an omniscient God is there no such thing as chance.