Christ became man, not angel, to save mankind

^9-12 What we actually see is Jesus, after being made temporarily inferior to the angels (and so subject to pain and death), in order that he should, in God’s grace, taste death for every man, now crowned with glory and honour. It was right and proper that in bringing many sons to glory, God (from whom and by whom everything exists) should make the leader of their salvation a perfect leader through the fact that he suffered. For the one who makes men holy and the men who are made holy share a common humanity. So that he is not ashamed to call them his brothers, for he says: ‘I will declare your name to my brethren; in the midst of the congregation I will sing praise to you’.