Halcon: What is heaven? What is the afterlife? We don't know what these things are...
But we should, shouldn't we? It's not just that heaven is the goal to aspire to, it's where we would spend the rest of eternity. If there is one thing we should want to know clearly and unambiguously, it's what heaven and the afterlife are.
Halcon: Job himself said "will we accept only the good from God?"
This runs into a similar (and much more important) issue. God wiped out almost all life on earth once, and this can only be a good thing, since it was done by God. In 1 Chronicles 13:9,10 we read about how God became incensed at Uzzah for a normal human reaction (reaching out to steady the Ark of the Covenant when the oxen transporting it lost their footing) and struck him dead on the spot. This was also a good action, because it was carried out by God.
Thus, the word "good" is meaningless in this context. God could decide to send all heavenly souls to hell for a period of a million years, just because he felt like it. And it would be good. There would literally be nothing wrong or bad about that action.
Halcon: what could we do about it? Absolutely nothing.
Right. Which means that we are the eternally powerless puppets of an unpredictable titan, who can --and will-- do with us as he pleases, and for whom the terms good/right/moral/fair are meaningless. We expect that this god will act only in a certain way, a way that we define as good or righteous. But this isn't how we have defined him. Job expected God to act in a certain way, too. He... miscalculated.
If that is the governing power of the universe and all existence, I'm not sure I see a difference between heaven and hell.