But the Parable is not actually about Hell, it's about the Jews losing the position and place they had in God, and the Gentiles taking their place.
No.
That is a complete misunderstanding.
The historical narrative --
not parable -- is about Sheol/Hades, the region where the souls and spirits went after death (and now only the unsaved go there). The words "hell" and "the grave" should never have been used for Sheol/Hades by the KJV translators. And it is not about the Jews losing their position, but about the selfish and covetous Pharisees who loved their wealth and despised the poor, and did not understand that they were on the brink of eternal damnation.
What most people fail to see is that there is a break between Christ's teaching on divorce to the Pharisees, and His teaching on the afterlife (also to the Pharisees). Luke chapter 16 is divided into three sections:
Verses 1-13 -- Faithful Stewardship (applicable to all Christians today)
Verses 14- 18: Multiple rebukes against the Pharisees who mocked Christ
Verses 19-31: Teaching on the afterlife. It is quite significant that all through the OT, Sheol is mentioned as the place of departed souls without much clarification. But here Christ expands the meaning of Sheol/Hades to explain that (a) the righteous dead are separated from the unrighteous dead by a great chasm (which cannot be crossed over) , (b) there is already torment for the unrighteous in Hades, and (c) the region of the righteous is metaphorically called "Abraham's bosom" (since Abraham is the example of those to whom righteousness was imputed because of their faith). So all the OT saints since Abel were also present there (see Hebrews 11).
And while the body of Christ lay in the tomb, His soul and spirit went to Sheol/Hades to preach to "the spirits in prison" (since Sheol/Hades was virtually a prison for the righteous, but in reality a prison for the unrighteous). But David (about 1,000 years before the crucifixion) spoke these words of Christ by divine inspiration in Psalm 16:10:
For thou wilt not leave my soul in SHEOL; neither wilt thou suffer thine Holy One to see corruption.
Therefore Peter quoted this on the day of Pentecost to confirm that Christ remained in Sheol/Hades for only three days and three nights, and was then resurrected (Acts 2:27,31): Because thou wilt not leave my soul in HADES, neither wilt thou suffer thine Holy One to see corruption... He [David] seeing this before spake of the resurrection of Christ, that his soul was not left in HADES, neither his flesh did see corruption. So when Christ rose from the dead He took all the OT saints (including Lazarus) to Paradise (Eph 4:8-10).