Sure, otherwise you're just solipsistic, we have to assume things exist, it's how you make progress. If you think quantum is "the real stuff that exists" then y

Sure, otherwise you're just solipsistic, we have to assume things exist, it's how you make progress. If you think quantum is "the real stuff that exists" then you should assume, for now, that the model actually models something, and our best guess is that it's merely probability theory.