it’s more likely an omnipotent being willed it into existence then everything happening solely by chance.

The problem with invoking God is that you end up right back at the same problem. If God created the universe, what created God? Any answer to that question can just be applied to the question of the universe itself.

God does not play dice with the universe

Einstein’s quote is him voicing his displeasure about the probabilistic nature of quantum mechanics. He thought the universe must be deterministic, though I don’t know exactly why. It was probably just a gut level thing.

Even though quantum mechanics is fundamentally probabilistic (you can’t know the outcome of an event until you do it, you can only predict probable outcomes) there are still people who argue the universe could still be deterministic. Their argument is essentially that even though quantum appears probabilistic, it could actually be deterministic and there’s just some completely unknown variable we have yet to discover determining the outcomes that we see as probabilistic.

But, you know, until we discover such a variable or a way to prove that it must exist, the universe seems to be probabilistic on the small scale.