We are children through adoption, joint-heirs with Christ.
But we are not "begotten of God the Father" as Jesus Christ is. The Son is the only-begotten.
If we were, that would make us divine gods, which we are not.
ETA: I slightly misread your post. I would have worded it just a little differently if I had understood your intent (I thought you were disagreeing), but the points are all still true. Please forgive me.
Surely not God Himself, or Christ Himself. But we came from God, if we belong to Him. We didn't beget ourselves. Perhaps we should consider ourselves the Children of God instead of the children of men, maybe then we might take our life in Christ more seriously.
1 John 10:33 The Jews answered Him, saying, For a good work we do not stone You, but for blasphemy, and because You, being a Man, make Yourself God.
34 Jesus answered them, Is it not written in your law, I said, You are gods?[c] 35 If He called them gods, to whom the word of God came (and the Scripture cannot be broken), 36 do you say of Him whom the Father sanctified and sent into the world, You are blaspheming, because I said, I am the Son of God?
Psalm 82 God stands in the congregation of the mighty;
He judges among the gods.[a]
2 How long will you judge unjustly,
And show partiality to the wicked? Selah
3 Defend the poor and fatherless;
Do justice to the afflicted and needy.
4 Deliver the poor and needy;
Free them from the hand of the wicked.
5 They do not know, nor do they understand;
They walk about in darkness;
All the foundations of the earth are unstable.
6 I said, You are gods,
And all of you are children of the Most High.
7 But you shall die like men,
And fall like one of the princes.
8 Arise, O God, judge the earth;
For You shall inherit all nations.