We need help ~ everything is not clear, and our sector in this part of the universe is rather violent and destructive ~ we barely hang on ~ in the 4 billion years there's been signs of the most primitive life around here, it's only in the last half billion we've been able to find enough stability to work out the code for making brains and eyeballs!
God sends us messengers and moral teachers ~ and as Jesus reported, it's a tough life ~ so it wasn't our imagination. I can easily see a need for God to use a special mechanism so the messenger may arrive intact and ready to do whatever it is a messenger needs to do. This messenger has to live in our world, not just look at it as apparently do the creatures called angels. So, the Immaculate Conception, the Virgin Birth, the Perfect Man ~ the Physical Assumption into Heaven ~ it all sticks together as a great machine that translates the fabric of God's universe to our universe and allows Him to speak to us.
He must think we're pretty special even if we don't think that ourselves.
"When I consider thy heavens, the work of thy fingers, the moon and the stars, which thou hast ordained;What is man, that thou art mindful of him? and the son of man, that thou visitest him? For thou hast made him a little lower than the angels, and hast crowned him with glory and honour" (Psalm 8:3-5)
"Then they that feared the Lord spake often one to another: and the Lord hearkened, and heard it, and a book of remembrance was written before him for them that feared the Lord, and that thought upon his name.And they shall be mine, saith the Lord of hosts, in that day when I make up my jewels; and I will spare them, as a man spareth his own son that serveth him." (Malachi 3:16,17)