I might as well stir the pot -- and YES, I'm a Christian Heretic -- If Jesus was God, and not merely a man filled with the Holy Spirit, we have been gypped!
Of course God can live a perfect human life if He chooses to do so. But a "Son of God"? A man who lives for God's will as a mere human who succeeds at being pure of heart -- to the end? That is the miracle and story of Jesus!
In Jesus' prayer to the Father in John 17, he is making requests for his disciples and all who have, and will, believe him. Notice the connections:
"20 I am not asking on behalf of them alone, but also on behalf of those who will believe in Me through their message, 21 that all of them may be one, as You, Father, are in Me, and I am in You. May they also be in Us, so that the world may believe that You sent Me. 22 I have given them the glory You gave Me, so that they may be one as We are one—23 I in them and You in Me—that they may be perfectly united, so that the world may know that You sent Me and have loved them just as You have loved Me."
And let's go back to what he tells the disciples about themselves going forward in chapter 14
"12 "Truly, truly, I say to you, he who believes [in] me will also do the works that I do; and greater works than these will he do."
Jesus proved with his life and his final resurrection, than we can be immersed in God and God in us, as was he, the first son to make it home. If he were God Himself, we lose that greatness? We diminish the HOPE.
How can "we" do greater works than God the Father? We can't! But "we", the future of mankind can, and have, done greater works than Jesus. And those that hold that pure heart to the end will go home where he has made a place for us.