Whenever somebody posits the extinction of the human race, they commit a religious reduction ad Hitlerum.
When Jesus Christ ascended, He was seated at the right hand of the Father. That is His Session. The Son of God or the Alpha is now also the Son of Man, or the Omega, and has been in Hypostatic Union since the first Advent.
During the Church Age, believers today have the same access to God, as provided by the Son, during this period of hypostatic union.
All things that have been created or could be created have been created by Him and stand under His authority. Today, He is both God and human.
Humanity in Him, is now higher in authority than the angels, although prior to our receipt of a resurrection body, they still have more power over man. Through faith in Christ, though He controls all history.
Prophecy regarding Israel still has not been fulfilled, so humanity will continue to exist for quite some time (gross understatement).
Conclusions that mankind will go into extinction, or any other such reasoning, should immediately trigger a error message to those making such conclusions,, even if they haven’t understood the theological doctrines regarding the hypostatic union, which is central advancing in Christianity.