I definitly agree that we can not mixed up human beahvior with quantum phisics
However even if we stick to phisics the question is a very hard one

- In the 19 century Scientists did not beleive in chance
chance was supposed to be a "lack" of information
There is not a chance that tomorrow rain
Simply we dont have all the correct informations about temperature - pressure - humidity etc
A lot of people think that this is the right answer, but it is false

- The theory of chaos claims that , in some situation, even though we have all the informations and a super computer as well, nevertheless we can not forcast the future beyond a certain period of time

- Some quantum phisics claim that claim the supposed indeterminism depend upon the measuring
If you measure an event you alter the event itself
However if you let nature alone , nature is deterministic even at atomic level

- Some other quantum phisics on the contrary beleive that at atomic level , nature is "really" non deterministic

As far as I know the problem of chance has not been solved yet