“If this is true, how do you explain the story of Simeon in the temple?”
He along with Anna knew their Old Testament prophecies.
Isa 7:14 Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel.
Do you need me to layout the problem? Either you don’t see it, or you’re avoiding it.