you cannot willfully choose different.
That you choice may contain a random emement doesnt only make less controlled, not free.
It only appears random and uncontrolled from an outside observer. The fact is that my consciousness agrees with the "random" choice made. We could be organisms that do things that we never wanted to chose at any time. I could just constantly be choosing things that I immediately did not want to choose, but we know that's not the case. We own our decisions, and we know we meant them at the time.
Here is where you go wrong. The randomness of a general wave collaps is not something you can control.
What you can do, and how quantum computers work, is to create a very narrow wavefunction so that one option has high probability and all others none.
You see: for a QM system to be said to have made a choice it must have singled out an single option. Thus there is not any random element left and thus any room for your version of "free will".