Interesting. Can you confirm my ELI5 understanding of it? Is it that we could potentially claim that QM is not really random, we simply do not have all the data

Interesting. Can you confirm my ELI5 understanding of it? Is it that we could potentially claim that QM is not really random, we simply do not have all the data (like predicting a dice roll without accounting for the roughness of the surface). But then, experimental evidence contradicts this claim. Correct?