You find it UNBELIEVABLE that people have a beginning, but GOD does not have a beginning.
How very peculiar of you.
And yet, it still says ...
[John 1:1-5, 14 NIV]
1 In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was with God in the beginning. 3 Through him all things were made; without him nothing was made that has been made. 4 In him was life, and that life was the light of all mankind. 5 The light shines in the darkness, and the darkness has not overcome it. ... 14 The Word became flesh and made his dwelling among us. We have seen his glory, the glory of the one and only Son, who came from the Father, full of grace and truth.
So I leave you with this thought ...
- Who has believed our report? And to whom has the arm of the LORD been revealed? - [Isaiah 53:1 NKJV]
... I know whose report I shall believe (John wins over Runningman).
Well, you didn't have any good points with saying that Jesus and people were incarnated. That rabbit hole leads to a major theological inconsistency. Therefore if people didn't pre-exist and Jesus is one of the people then he didn't pre-exist either.
I am so glad you say you are willing to believe apostle John. Know what else he said? Try Acts 4:23-31 and 1 John 1:1-3.
No need to make a lengthy post since we all have Bibles, but in Acts 4:23-31, John and Peter prayed to God the Creator of heaven and earth and in that prayer they called Jesus God's servant (some translations say they called him God's son.)
In 1 John 1:1-3, John talked about the Word of life again. He called it a "that, which, this, and it" said the Word of life is the eternal life that was with the Father was revealed to them. That means the Word is a thing, not a pre-existent person, and that John 1:1,14 must be personification of a non-person thing. There is not other explanation for John 1 being translated to call the Word a he and then for John to turn right around and call the Word a thing.
1 John 1 (KJV)
1That which was from the beginning,
which we have heard,
which we have seen with our eyes,
which we have looked upon, and our hands have handled
, of the Word of life; 2(For
the life was manifested, and we have seen
it, and bear witness, and shew unto you
that eternal life,
which was with the Father, and was manifested unto us
3That which we have seen and heard declare we unto you, that ye also may have fellowship with us: and truly our fellowship
is with the Father, and with his Son Jesus Christ.