These arguments capitalize on objectors knowing the precise details of eternal perdition more than we are told.
To be fair, sometimes believers also may submit details of the nature of eternal perdition beyond what they have been told.
Having said that, what we are told conveys the message - eternal separation from God should be avoided.
The rich man who is in torment in the flames in
Luke 16 seems coherent enough to carry on a conversation - a very sad one. But he has enough wits in his punishment to contemplate and speak to Abraham afar off about his punishment.
I can't think of being in such a situation without loud screaming. This man was talking rather coherently though he said he was in torment.
"And he called out and said, Father Abraham, have mercy on me, and send Lazarus to dip the tip of his finger in water and cool my tongue, because I am in anguish in this flame." (v.24)
"And he said, Then I ask you, Father, to send him to the house of my father- For I have five brothers - so that he may solemnly testify to them, lest they also come to this place of torment." (v.28)
" ... No Father Abraham but if someone risen from the dead would go to them, they will repent." (v.30)
The picture is one of a punished soul being coherent to soberly contemplate and even speak of his condition. At least for this soul such a situation is conveyed.
Parable or history, the TEACHING is that man needs to soberly think about his condition before God on the life side of the grave.
If annihilation into non-existence is the reality then I think Jesus Christ would have been unrighteous to produce a parable OR a record, of judgment that is impossible.
The annoyance leveled at believers in the words of Jesus (whose integrity is for me beyond questioning) is misdirected. Either Christ was unrighteous to even make us think such a possibility could happen OR He is faithful, frank, and realistic to warn us.
" If they do not hear Moses and the prophets, neither will they be persuaded if someone rises from the dead." (v.31)