John 1:14 uses ginomai verb. If we stick to Word-to Word translation, it seems to be correct.
But in that sentence, ginomai has some other meaning. As the Lexicon by William Mounce indicatd, ginomai has the meaning of " assume the appearance of ", which coincides with 1 Tim 3:16. God was manifest in flesh.
Otherwise, if The Word became Flesh, then it contradicts "God is a Spirit" Jn 4:24
"It is the Spirit that quickeneth; the flesh profiteth nothing" Jn 6:63
The Word didn't become nothing!
The meaning of Incarnation is that Word was enfleshed as we read Heb 10:5, 7
Heb 10:5
Wherefore when he cometh into the world, he saith, Sacrifice and offering thou wouldest not, but a body hast thou prepared me :
10:7
Then said I, Lo, I come (in the volume of the book it is written of me,) to do thy will, O God.
Jesus existed before His birth and communicated with Father. He came! He was not produced by birth! He was enfleshed by Holy Spirit, not by Mary!
Do you read Jesus was born already in Mary by Holy Spirit, before He was born out of Mary?
Read Matt 1:20, you will make a very interesting discovery in Greek.