So our starting point when thinking about universalism doesn't have to be "How does this fit into the Bible?" It could instead be "How could God possibly allow any one of His children to be be lost/annihilated/tortured forever".
Well, there is arguing which claims that if there were God who is loving and good and fair, there already would be no suffering because it's not fair how certain innocent ones suffer much more than others who are more guilty of wrong.
So, your quoted question could work as a back-door argument in favor of atheism. I am not saying you mean this, but if God is good so He would not have people suffering after they die, then one could add to this that God who is good also would not allow suffering now in this life. And if already suffering is unfair, how could there be a fair God letting people suffer now?
But I have read some arguments using scriptures of certain universalists who do not try to use the argument you gave and I just quoted.
In any case, there is already suffering and punishment because of sin. But God has not already gotten rid of this or prevented this. And many are suffering in their sin, right while they have never had an opportunity to hear the Gospel . . . it seems, anyway.
People suffer consequences, and suffer because of not being with God . . . already. And God has not stopped this. And, often enough, ones suffer more than they deserve, it would seem to me, for even wrong things they do.
In any case, at least we could say, sin is not fair. Satan's kingdom is not fair with his children. They are in
"the spirit who now works in the sons of disobedience," our Apostle Paul does say in Ephesians 2:2. And the things of Satan's spirit are cruel and dishonest and unfair . . . causing much cruelty and abuse much more than I would say people deserve to suffer while giving in to Satanic things . . . such as worry, and unforgiveness, and being dominated by lusts which waste people for foolish pleasure and the frustration and anger and arguing involved in not getting it. This stuff is unfair. And God is better
So . . . we could go atheistic and say this is unfair and therefore a fair God would not allow this now or cause this after people die. But I have thought and prayed about how it can be that there is endless suffering . . . already started . . . right while there is God so good. And I experience that God is kind and good; so what am I supposed to do? Do what God blesses me to do to help anyone be with God and spend eternity with Him.
Let's just thrash this out a bit and take an example from one of theses categories. Suppose we have a adult with severe learning difficulties. He's spiritually dead and then dies having only been born the once. Does he go to hell?
Let's say someone is like a dead piece of wood: what will happen to that wood, in the presence of fire? It does not matter how intelligent the wood is or isn't; still it will burn in the fire.
The character of the wood decides what will happen to it, in different circumstances.
"For our God is a consuming fire." (Hebrews 12:29)
Your character has a lot to do with what becomes of you in the presence of God. We can see what became of certain people in the presence of Jesus > they hated Him. Others loved Him.
And may be, by now, you have seen how much knowledge helps people. There are ones who know smoking has ruined people and their lives; yet, they now are still smoking and even helping others to start smoking. Their character, not their knowledge or intelligence, can have so much to do with what they do - -
or are capable of doing.
On the day of judgment, Jesus will know what we have done, and the character in which we have done things. And, possibly, in the case of ones who are incapable of knowing and understanding, He will know what their character is capable of. The fire will prove.