This isn’t an attempt to change your mind @DogandMog, I can see you’re fully committed to your position. 😊
However, as there may be others following this conversation, I would like to offer my solely Biblical responses to your three points.
“Luke 1:34 - the annunciation - “how can this be since I do not know a man?”. This question only makes sense in the context of her understanding that she was a consecrated temple virgin …”
No, there’s zero Biblical evidence that Mary was a “consecrated temple virgin”. When the passage is read in context, Mary’s question makes sense because she was, at that time, a virgin, and understandably wanted to understand how she would physically become pregnant with the Son of the Highest …whose kingdom would never end.
“And behold, you will conceive in your womb and bring forth a Son, and shall call His name JESUS. He will be great, and will be called the Son of the Highest; and the Lord God will give Him the throne of His father David. And He will reign over the house of Jacob forever, and of His kingdom there will be no end. Then Mary said to the angel, “How can this be, since I do not know a man?” And the angel answered and said to her, “The Holy Spirit will come upon you, and the power of the Highest will overshadow you; therefore, also, that Holy One who is to be born will be called the Son of God.”
Luke 1: 31-35
“Ezekiel 44:2 “The gate shall remain shut; it shall hot be opened, and no one shall enter by it, for the Lord, the God of Israel has entered by it”. This vision indicates that Jesus’ birth was unique and no other siblings followed after;…”
Now this is a considerable stretch of interpretation! Again a fuller reading of the passage in context reveals no connection with Mary, nor of any of Christ’s siblings, but rather a vision concerning the Temple.
“Then He brought me back to the outer gate of the sanctuary which faces toward the east, but it was shut. And the LORD said to me, “This gate shall be shut; it shall not be opened, and no man shall enter by it, because the LORD God of Israel has entered by it; therefore it shall be shut. As for the prince, because he is the prince, he may sit in it to eat bread before the LORD; he shall enter by way of the vestibule of the gateway, and go out the same way.
Also He brought me by way of the north gate to the front of the temple; so I looked, and behold, the glory of the LORD filled the house of the LORD; and I fell on my face. And the LORD said to me, “Son of man, mark well, see with your eyes and hear with your ears, all that I say to you concerning all the ordinances of the house of the LORD and all its laws. Mark well who may enter the house and all who go out from the sanctuary. Now say to the rebellious, to the house of Israel, ‘Thus says the Lord GOD: “O house of Israel, let Us have no more of all your abominations. When you brought in foreigners, uncircumcised in heart and uncircumcised in flesh…”
Ezekiel 44: 1-7
“John 19:26-27 - “”Woman, behold your son!” “[John], behold your mother!” And from that hour the disciple took her to his own home.” Why did Jesus entrust the care of his mother to John the Baptist, if there were younger siblings? …”
Firstly, John the Baptist was already dead. Again a fuller reading of the passage reveals much -
“Now there stood by the cross of Jesus His mother, and His mother’s sister, Mary the wife of Clopas, and Mary Magdalene. When Jesus therefore saw His mother, and the disciple whom He loved standing by, He said to His mother, “Woman, behold your son!” Then He said to the disciple, “Behold your mother!” And from that hour that disciple took her to his own home.”
John 19: 25-27
This is none other than the writer of John’s Gospel (& Revelation), a son of Zebedee (like his brother, James).
Now why would Jesus entrust His mother to this man and not one of His brothers? Not such a mystery when one remembers that His brothers were not always believers
“For even His brothers did not believe in Him.”
John 7:5
this, coupled with our Lord’s statement relegating earthly relationships to a secondary position beneath His kinship with those who believe in and follow Him (see Luke 8:19-21) begins to illuminate why He chose His “beloved disciple” to care for His mother, rather than His (at that time) unbelieving earthly brothers.
“Then His mother and brothers came to Him, and could not approach Him because of the crowd. And it was told Him by some, who said, “Your mother and Your brothers are standing outside, desiring to see You.” But He answered and said to them, “My mother and My brothers are these who hear the word of God and do it.”
Luke 8: 19-21
The brothers and sisters of Jesus are mentioned several times in scripture. We are given the brothers’ names as James, Joses (aka Joseph), Judas (aka Jude) and Simon. The sisters are not named.
“Is this not the carpenter, the Son of Mary, and brother of James, Joses, Judas, and Simon? And are not His sisters here with us?” So they were offended at Him.”
Mark 6:3
Paul makes two references to the brothers in his letters:
”But I saw none of the other apostles except James, the Lord’s brother.”
Galatians 1:19
”Do we have no right to take along a believing wife, as do also the other apostles, the brothers of the Lord, and Cephas?”
1 Corinthians 9:5
Dr Luke also mentions the (now believing) brothers of the Lord in Acts 1:14
“These all continued with one accord in prayer and supplication, with the women and Mary the mother of Jesus, and with His brothers.”
There’s no Biblical reason to assume that these men and women were anything other than the natural children of Joseph and Mary.
For further study
www.christianity.com/jesus/life-of-jesus/youth-and-baptism/how-many-brothers-and-sisters-did-jesus-have.html