No doubt, but it will be too late by then.
Anyone would believe in God if they saw him face to face. Scripture says that we walk by faith, not by sight, 2 Corinthians 5:7. Scripture teaches us that God values faith; people who trust and love God even though they can't see him. Jesus said, "you believe because you have see me, blessed are those who have not seen and still believe", John 20:29.
I agree for the most part with your explanation but not your conclusion.
The claim of most is that hell will be full of God-haters. Thus inferring that eternal torment is justified. When questioned about who will be in heaven, they define a very narrow section of humanity. If we then take account of who falls outside of that narrow section we find the majority of those to not be God-haters. So much for the justification of eternal torment.
You and I agree that; "Anyone would believe in God if they saw him face to face."
Well, will we not all face judgment? And in doing so see God face to face? Seems so. But to be fair, your point was that it will be too late. That those in the realm of the dead will not have the opportunity to acknowledge Jesus as Lord. Well, I have good news. They can and will. See scripture below. Every knee will bow and every tongue acknowledge Jesus Christ is Lord. Even "under the earth" in the realm of the dead. (the afterlife) So much for too late. Ill-advised to wait, but not too late. Grace wins in the end.
Philippians 2:10-11
that at the name of Jesus every knee should bow,
in heaven and on earth and
under the earth,
11 and every tongue acknowledge that Jesus Christ is Lord,
to the glory of God the Father.
Note on "acknowledge" in Philippians 2:11
S1843 eksomologéō (from 1537 /ek, "wholly out from," intensifying 3670 /homologéō, "say the same thing about") – properly, fully agree and to acknowledge that agreement openly (whole-heartedly); hence, to confess ("openly declare"), without reservation (no holding back).