"Deterministic" and "random" are antonyms, though. There's nothing random in icy planets being far away from the star, to give a simple example.
If you travel from system to system ice moons are all going to be in random places, within the rules for icy moons. Yes, it technically deterministic but the experience is random with rules, which is the context that the word random was used within the interview as far as I was concerned.