I am an atheist, but this doesn’t seem like a strong argument to me. The answer seems clear: He wanted Jesus to be partly human due to all that stuff about sharing our sins and so forth. It’s nonsense to me, but it appears to make sense to believers.
Nope. Jesus could not understand humanity because he still remembered heaven, could talk to and get answers from God, knew with proof what was gonna happen. Humans have no proof of that, we can’t hear a god, no one I know and trust have come back to assure me there is a golden, beer filled, Hawaiian tropic model filled beach party waiting for me after I go through all this cancer bullshit.