Let's put quantum mechanics aside and suppose we live in a universe that is 100% deterministic. In that universe, we still can't predict chaotic and overly comp

Let's put quantum mechanics aside and suppose we live in a universe that is 100% deterministic. In that universe, we still can't predict chaotic and overly complex things very well, like rolling a die or shuffling a deck of cards, even though in principle it would be possible if we had incredible computer models and incredible knowledge about the state of the universe beforehand. That's the kind of randomness that we're talking about when we talk about predictability. It turns out most kinds of randomness most everyone deals with is that kind of randomness. Even in the our universe with all its quantum weirdness, we could in principle predict perfectly predict most die rolls with good enough measurements and computers. It turned out that's what we meant by randomness all along. It isn't tied to physics or philosophy. Most of the things we call random, aren't truly "random" in the strictly physical sense, so we realized that we ought to have a theory that is agnostic to physics and philosophy. It turns out that the predictability version of randomness does a great job at both, so we don't have to talk about that other stuff when we apply it.