Hidden variables have not been disproved. What has been proved by Bell's inequalities is that any hidden variables that exist must themselves be irreducibly "quantum", so interest in the theory faded because for those of us on the inside of the universe the existence of fundamentally indeterminate hidden variables is just an unnecessary useless complication. But hidden variables may still exist. For instance, a computer simulating our universe may be using a deterministic PRNG (with strong statistical properties) to resolve quantum mechanics, which makes it deterministic on the outside for those who know and control the PRNG, while appearing fully random on the inside.

There is no such thing as "absolutely random". I'm not kidding, if you try to really seriously define it with math it comes apart in your hands. Both randomness and probability are intrinsically relative.