>1. is it possible that the unpredictability in quantum physics is just due to lack of knowledge we have?This is what's known as a "hidden variable theory."
https://en.wikipedia.org/wiki/Hidden_variable_theoryIt's generally seen as completely worthless today. Pretty much everyone who espouses these sorts of theories are viewed as crackpots by physics academia. Why? Because there are only two possibilities: A) there is some experiment that will reveal these hidden variables we somehow haven't thought of yet, and yet these hidden variables will act like QM in every experiment we have so far done (possible, but extremely unlikely, and if it were the case it still certainly wouldn't be classical because of all those QM results it has to create), or B) we cannot possibly ever detect these hidden variables, in which case, why even posit they exist?
>2. how does the possible randomness in quantum physics effect us at all, and does it even imply a indeterministic world?Radiation is pretty much always probabilistic. Outside of that, there's not much we see directly as a result of it, though that will change when quantum computers become a thing. It's possible consciousness arises from it, though we don't know enough about it to say for sure either way (leading theories right now say "no"). But rest assured, if QM didn't work the way it did, we almost certainly wouldn't exist.
