I think the whole point of Jesus was that he was supposed to be God come down to live on Earth and have the whole human experience. If Jesus wasn't human, what was the point?
Perhaps one of our resident expert theologians can help.
I'll see if I can help, but I wouldn't classify myself as an expert.
I do believe that Krishna, one of the avatars of Vishnu, the second person of the Hindu trinity, came to Earth to enter the whole of human experience. Christian theology is quite different. The reason that Jesus came was quite different. In Jewish thought, humanity had fallen from paradise through disobedience. Throughout their history, it was shown that even their greatest prophets and kings eventually fell into disobedience, and along with their fall, the Jewish nation also fell.
At the first fall, God promised an offspring that would crush the head of the serpent. The serpent was the source of the deception that lead to their disobedience. So how would this promised offspring accomplish this crushing?
Christian thought is that Jesus accomplished this through perfect obedience to the will of the Father, the will of God. At the outset of Jesus' public ministry, he spends forty days in the desert, and he is tempted by the devil (who is said to be the serpent). He is tested in three ways. He is tempted to eat, by changing stone to bread, to satisfy his hunger (or to address a fear of death). He is tempted with power, to rule over all the kingdoms of the earth. He is tempted with putting God to the test by leaping from a great height, with the expectation that God would save him. These temptations did not stop throughout the course of his ministry.
Jesus was believed to be the messiah, and the vast majority of Jews expected that messiah to be a revolutionist, and leader who would free them from Roman rule. He was repeatedly pressured to show himself to be this kind of king. Herod asked during his interrogation if he was a king. The inscription posted on the cross over his head at his crucifixion read "Jesus, the Nazarene, King of the Jews." It was a taunt. The serpent had offered him rulership over the world, Jesus refused, and right to his death it was thrown in his face. An insult, but always a subtle offer, so as to say, "remember what I offered, submit to me and I can still grant it."
During Jesus public ministry, his teachings were constantly put to the test by the Jewish leaders. It wasn't just an attack for him to prove himself, though. In Jewish history, prophets were always given messages from God to give to his people. False prophets held messages from false gods, or demons. This public testing was to put the source of Jesus' message to the test, "make your god prove himself." Even to his death, Jesus was asked to prove. While he was hanging on the cross, people taunted him saying that he had saved others but couldn't save himself.
The bread symbolism was used throughout Jesus' ministry. He often spoke of "true bread," meaning bread that fed the spirit, and not just the body. It was the bread that "gives life," meaning life to the spirit, rather than simply bodily life. And when Jesus bodily life was put to the deepest risk, he held fast to the tenet that spiritual life, which is found in obedience to the will of God, is more important, greater than bodily life. He died bodily in order to hold to his spiritual integrity, in obedience to the Father.
Jesus' mission was to redeem mankind, and the temptations of Christ were designed to lead him from that mission. Since the fall came through disobedience, the redemption came through obedience. Since the consequence of sin was suffering and death, the acceptance of these consequences to their fullest extents was the method of the offense repayment. Thus the temptations consist in this: Christ came to defeat (spiritual) death and give (spiritual) life back to mankind, so Satan tempted him with (bodily) food; Christ came to return mankind to God's kingdom (family), so Satan offered him all the kingdoms of the earth; Christ came to prove humanity to God, so Satan tempted him to prove God to man.
And for any of this to have meaning to humanity, Jesus had to be human.