My pet question with quantum physics (of which I know very little) is related. It seems simpler to assume we just don't know, rather than attributing it to the

My pet question with quantum physics (of which I know very little) is related. It seems simpler to assume we just don't know, rather than attributing it to the unusual property of true unpredictability. We already know that a chaotic dynamic system is difficult to predict, and even encryption algorithms we conjure up have very high entropy. So why isn't that enough here?