Because that would have defeated the purpose of living a life following the will of the Father and not His own, like it or nor His own words.
How well do you understand the atonement and what Jesus did / what happened to Him? (And I'm not just talking physically.)
It's a whole different ballgame when He rises from the dead, as Ephesians 1:19-23 explains. Christ began to reign as King upon the resurrection.
All three "members" of the Trinity always had the same eternal purpose in action. The Father's will was no different than the will of the Divine nature of the Son. What Jesus contended with in his human will, was the frailty of being human; as well as the knowledge he had of what was going to happen to Him/him. This is why he says "Not my will, but Yours be done."
Now imagine living your entire life in perfect communion with both Father and Spirit to the point the "3 days and 3 nights" in the heart of the earth commences. (That started Tuesday night after sundown and ended upon Jesus's death when he said "It is finished".)
So, what's happening to Jesus in those 3 days and 3 nights, is that he is being severed from the other 2 persons of the Trinity. This is why he says: "My God, why have You forsaken me?" That wasn't just a statement thrown out there for what ever benefit we might get as readers 2000 years later - that was a real experience to him.
The sinner who will endure the lake of fire will do so outside of God's presence. This is why this happened to Jesus. In order to pay the penalty for sin, he had to be forsaken by the Spirit and Father.
So he gets further and further into this process and we read that his emotional distress increases exponentially. By the time we get to Gethsemane; Jesus is a mess. He's actually nigh on psychosis from lack of sleep and emotional distress. Jeremiah 25 explains to us that the wrath of God causes the nations to go mad. So Jesus is approaching a psychiatric crisis tipping point.
Then what happens to him?
He's visited by an angel. Now the English translation says this angel "strengthens" him. The Greek though means "show of strength before (or against)". Go back to Exodus. What angel passed through the land at midnight on the Passover? The angel of death!
So what does the angel of death do to Jesus? He removes the breath of life (which makes humans "living souls") and consigns Jesus's soul to Sheol. This is where Jesus "preaches to the captives in prison". Note though, this does not kill Jesus. Why not? Because he possesses a Divine nature. If Jesus was not God incarnate, he would have died once confronted by this angel.
So note how Jesus acts post the angel visit. There's no more pleading, no more crying, no more asking for another way. He's still obviously intellectually and morally intact. And Jesus goes through the rest of the trial and the crucifixion pretty much emotionless.
Jesus makes a statement in Matthew 24, that unless the "great tribulation" was shortened; no flesh would be saved. When was "flesh saved"? That had to do with events related to the cross. His emotional ordeal ("great tribulation" of the soul of God incarnate) was "shortened" by consigning his soul to Sheol. So the angel of death was a mercy to us particularly.
We get to the end of the crucifixion. Jesus "knowing all was accomplished" says "I thirst." Someone gives him vinegar and hyssop (which is actually a primitive sedative) He "squawks" something incomprehensible to the people hearing him. The Holy Ghost "steps in" to "interpret" to us what was actually said in the penning of the Scripture and we get "into your hands I commend my spirit" and "it is finished". Which one he said first? I'm not sure we can figure that out from the Scripture.
Jesus dies.
The curtain in the temple is torn from top to bottom. This symbolizes the renting of the Divine nature from the human nature and this is actually what kills him.
Spirit and soul ascend into heaven, body goes into grave. Along with Jesus goes all those who were elect (those atoned for) on the old testament side of the cross. They ascend strait to the 3rd heaven. Jesus begins opening the scrolls. Body rests on the Sabbath.
Come Sunday morning; human spirit and soul plus Divine nature are all "reassembled" back into this body an He rises from the dead. He comes out of the tomb essentially in the same body that went into the tomb. (Obviously all healed up - and no one seems to recognize him.)
So, did the Father raise Jesus's body, the Holy Ghost, Did Jesus raise his own body? Now He's elevated back to eternal equality with the Father and does it really "matter" in that sense who raised the flesh?
