The term "Son of Man" actually means born of God. In contrast the term "Son of a Woman" is a figurative statement to one born from a woman. The first Adam was also a "Son of Man" this also helps understand what was said: "So it is written: “The first man Adam became a living being”; the last Adam, a life-giving spirit." -1 Corinthians 15:45
Also these words where spoken publicly, At this point of his ministry he was not to be publicly known as "the Holy One of God" We see this because he told the evil spirit to “Be quiet!” (Mark 1:24-26). During the time of Jesus the Jews still had time.
“Seventy ‘sevens’ are decreed for your people and your holy city to finish transgression, to put an end to sin, to atone for wickedness, to bring in everlasting righteousness, to seal up vision and prophecy and to anoint the Most Holy Place.
“Know and understand this: From the time the word goes out to restore and rebuild Jerusalem until the Anointed One, the ruler, comes, there will be seven ‘sevens,’ and sixty-two ‘sevens.’ It will be rebuilt with streets and a trench, but in times of trouble. After the sixty-two ‘sevens,’ the Anointed One will be put to death and will have nothing. The people of the ruler who will come will destroy the city and the sanctuary. The end will come like a flood: War will continue until the end, and desolations have been decreed. He will confirm a covenant with many for one ‘seven.’ In the middle of the ‘seven’ he will put an end to sacrifice and offering. And at the temple he will set up an abomination that causes desolation, until the end that is decreed is poured out on him.”
The idiom of a "week" of years was common in Israel as a "sabbath for the land," in which the land was to lie fallow every seventh year. (Leviticus 25:1-22; 26:3-35; Deuteronomy 15.)
Here is your explanation for the time lapse of titles. The mathematical prophecy. The Jewish (and Babylonian) calendars used a 360-day year; 69 weeks of 360-day years totals 173,880 days. In effect, Gabriel told Daniel that the interval between the commandment to rebuild Jerusalem until the presentation of the Messiah as King would be 173,880 days. His ministry began before his wanted to present himself as King.
The commandment to restore and build Jerusalem was given by Artaxerxes Longimanus on March 14, 445 B.C. [a]
Fulfillment of the prophecy (Zechariah 9:9). The endorsement as King (Luke 19:40). This is the only occasion that Jesus presented Himself as King. It occurred on April 6, 32 A.D. [b]
When we examine the period between March 14, 445 B.C. and April 6, 32 A.D., and correct for leap years, we discover that it is 173,880 days exactly, to the very day! The completion of 69th of the Seventy Weeks.
Jesus did in fact die after the period of sixty-two ‘sevens,’ as predicted. One ‘seven.’ still remained after presenting himself as the king. During which he was put to death to put an end to sacrifice and offering (Daniel 9:27).
With completion of the 70 weeks the New Covenant was sealed, finish transgression, to put an end to sin, to atone for wickedness, to bring in everlasting righteousness, to seal up vision and prophecy and to anoint the Most Holy Place.
Also in the time of 70 A.D. the Romans destroyed the city and temple[c] as predicted as occurring after the sixty-two ‘sevens,’ and also after the Death of Jesus "..The people of the ruler who will come will destroy the city and the sanctuary..." -Daniel 9:26
[a] First identified in Sir Robert Anderson's classic work, The Coming Prince, published originally in 1894. Now available in any Christian bookstore.
[b] Luke 3:1: Tiberias appointed in A.D. 14; 15th year, A.D. 29; the 4th Passover occurred in A.D. 32.