It’s not really a guessing game, it’s a there’s his gospel, we follow his gospel and we’re rewarded, which he will ensure everyone has an opportunity to, or they can choose otherwise and receive the level of reward they so desire. No one’s going to force somebody to live in a specific way; That’s against the point.

And God is good because he gives us a choice. Choice means we can become our own individuals, make our own mistakes, learn, and grow. Which to us is the fundamental answer to the purpose of this life. (Buddhism “Life is Suffering”) Otherwise, what’s the point of it all? We’d be hollow machines, always living in a good but un-understanding state of being with no opportunities to grow and move forward.