If a person objectively takes the time to think through the discussion on eternal torment verses annihilation, then he or she will have to conclude that the latter view is a practically inadequate theory on how God punishes the unbelieving world. If the wrath of God is satisfied, then why should He destroy the soul of the sinner in the first place? If a person has served his or her due sentence, then would that not imply that he or she has been justified? If the wrath of God has not been satisfied, then why should He put an end to the designated punishment? You cannot punish something that does not exist. God would be compromising His righteousness by destroying people who have already paid their due sentence.
There is much more to being a Christian than merely escaping from the wrath of God. That is only the beginning of the Christian walk. The Christian religion is not merely a code of ethics. Conversion marks the beginning of us being reconciled to a holy God. As regarding the immortality of the human soul, only God is eternal in the sense that He is uncreated and self-sufficient. Our souls continue to thrive for the reason that they are sustained by His power.