**Was John wrong?**
No. Here's some points I've tried to make.
Jesus was/is God ONLY because he had/has the Father in him 'doing the works'.
"To wit, that God was IN Christ, reconciling the world unto himself.." 2Cor. 5:19
Red letter versions do not make the distinction of when the Christ was speaking as the voice of the one and only God of the universe, or as a mortal man.
As the voice of the only God, he said, "Destroy this temple, and in three days I will raise it up". John 2:19 or "Before Abraham was, I am". John 8:58
As the Son of God, he said, "I can of mine own self do nothing.." John 5:30 or "I thirst". John 19:28
The Christ is the focal point now. "God...hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds". God didn't start any of this, without first having the plan of a redeemer. Remember the Son's literal beginning was when he was 'made of a woman, made under the law'.
The 'right hand' is the place of power.
Since the resurrection, all power is given unto him:
"For it pleased the Father that in him should all fulness dwell." Col. 1:19
"For in him dwelleth all the fulness of the Godhead bodily." Col. 2:9
He that hath the Son (the image of God), also hath the Father (the Spirit of God)
"And whatsoever ye shall ask in MY NAME, that will I DO, that the Father may be glorified in the Son. If ye shall ask anything in MY NAME, I will do it." John 14:13,14
Who has all power? The one who baptises with the Holy Ghost. Luke 24:49 "And, behold, I send the promise of my Father upon you..(the Holy Ghost, that portion of the Spirit of God that is 'given to them that obey him').
You want the Father to help you in some way, you call on Jesus.
You want to be filled with God's Spirit, you call on Jesus.
That's why the disciples baptized in the name of Jesus. It's the 'name' (singular) of the Father, and of the Son, and of the Holy Ghost. John 5:43; Matt. 1:21; John 14:26
This same Jesus shall "..shew, who is the blessed and only Potentate, the King of kings, and Lord of lords. Who ONLY hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see (remember, you can't see the Spirit of God): to him be honour and power everlasting. Amen." 1Tim. 6:15,16
Thanks Z, I think this completely supports exactly what I said. Father, Son, and Spirit. Three realms of 1 divine God. Much as he created us in his own image, "body mind spirit" though we lack his eternity, we are a picture of his trinity.