To confine our attention to terrestrial matters would be to limit the human spirit. - Stephen Hawking

We only have to look at ourselves to see how intelligent life might develop into something we wouldn’t want to meet,

Maybe that is our mistake: maybe there are no particle positions and velocities, but only waves. It is just that we try to fit the waves to our preconceived ideas of positions and velocities. The resulting mismatch is the cause of the apparent unpredictability.

It is a matter of common experience that things get more disordered and chaotic with time. This observation even has its own law, the so-called second law of thermodynamics.