“Because of the chaotic quantum unpredictability of nature, our will is free from prediction.”
Consider it: The universe evolves in an unpredictable manner. We create models in science to predict, but these are always approximate. With quantum mechanics we realize events are based on probabilities rather than certainties. Particles have probabilities of where they will be found. It cannot be known where a particle is until we measure it, which affects where it is going.
If our will cannot be predicted in principle, then we are free from predicting the choices of others.
Our desires are of course determined by the history of our species. The behavior of our ancestors create the world we live in now.
To some extent we have “free want”. We feel a freedom in choosing what we want, what has led our species to be successful in the past.