Because today there are still lots of people who do not want to accept what Jesus really says and really has done. They keep saying it was impossible for a man to do such thing as Jesus did. By saying so they nullify the act of Jesus and create a position where God could be thought of as a cruel God Who created human beings and imposed on them a Law which He knew they would never be able to keep.
We may not forget what happened in the Garden of Eden and how God provided a plan offering mankind a Redeemer.
On the newly created site "The human Jesus" Xavier Carlos Jimenez writes
The first we are aware of this is at Genesis 3:15, where we see the seed of the woman, that is a descendant of Eve, is the future Messiah. Jesus Christ is prophesied throughout the OT, but does not come into existence until the NT where his birth was foretold by the angel Gabriel to Mary (Luke 1:26-38).In the knowledge that God is an eternal Spirit, having no beginning (no birth) and no end (cannot die) much more Christians should wonder who they praise and Who they should worship. We also know from the Biblical account that the Nazarene man Jeshua was going to be called a god, a special some one. though never was it the intention to have him being called the god son.
In Luke 1:32-33 Gabriel says,
“He will be great and will be called Son of the Most High. The Lord God will give him the throne of his father, David, and he will reign over Jacob’s descendants forever, and his Kingdom will never end” (cp. 1Chron 17:10-14).
Through a biological miracle God procreated Jesus in the womb of Mary, who was a virgin. “For this reason alone”, and no other, Jesus became the Son of God, descendant of King David of the tribe of Judah through Mary (Luke 1.35).We should remember that it was only some two millennia ago that Jesus became an existing being on this earth. Before that he may have been written down in the books of life and death, but he did not exit yet as a real person. Already before Abraham was born he was in God's head, like Abraham, Isaac but also we are already in God's head and in those books. It was only after the prophet Mica and earlier prophets of the Hebrew writings that the send one from God became a reality in the flesh.
At the time of Joseph and Mary.
This was the moment when Jesus was begotten, that is, brought into existence. There is no pre-existence of Jesus Christ, and it is when we become aware of this fact through our prayerful study of Holy Scripture that we really get to know him as the human being that he was and remains.Too many who call themselves Christian never read the whole Scripture (Old and New Testament) and often they only read some passages with their doctrinal glasses on.
Let yourself not being carried away by human doctrines but listen to the proper words of the Holy Scriptures. Read what is really written there. when there is written "son of God" do not read "god the son" or do not think "God" but think "Jesus" or just what is written their "son of God".
Knowing the truth about who is Jesus, we begin to see him in a whole new light. The scriptures open up to us more fully and we see how the prophesies in the OT are brought clearly into focus in the NT through the Good News of the Kingdom of God. We see our future as heirs ruling with Jesus in the Kingdom on earth, and we are humbled to think of such a privilege to be with our King. It is when we understand the true nature of Jesus Christ, that he is a man, and not a pre-existent God or part of a trinity, that we can really get to know him as our brother.
“For there is one God and one mediator between God and humanity, Christ Jesus, himself human” (1 Tim 2:5).