Just as God consulted the angels to make humanity, He consults them again to remove humanity from paradise. Targum Pseudo-Jonathan on (Genesis 3:22) records the divine deliberation.
"The Lord God said to the angels who ministered before Him, Behold, Adam is sole on the earth, as I am sole in the heavens above; and it will be that they will arise from him who will know to discern between good and evil."
The parallel is startling. Adam occupies a unique position on earth — the only being with moral knowledge — the way God occupies a unique position in heaven. Humanity has been elevated to a kind of singularity. The Targumist is not suggesting Adam is a god; he is noting that Adam has entered a category that no creature before him belonged to. He is alone in a new way.
Why Eden must be closed
"Had he kept the commandments which I appointed to him, he would have lived and subsisted as the tree of life for ever. But now, because he hath not kept that which I prescribed, it is decreed against him that we keep him from the garden of Eden, before he reach forth his hand and take of the tree of life."
The exile from Eden is protective, not punitive. If Adam stayed and ate from the Tree of Life, he would become immortal in his fallen condition — stuck forever in a state of alienation from God. Mortality, the Targumist hints, is a mercy. It gives humanity an end and therefore a future.