Because we are all descendants or the offspring of Adam, who rebelled in the garden of Eden and thus became flawed or imperfect, we received only that which our forefather Adam could give us - sin - which is from the Hebrew word chattath that means "miss", as in shooting at something and missing.
It can be likened to a production run whereby a critical piece is dented, so that all items created with that mold are also dented. Adam became "dented" or flawed when he "listened to" Eve's voice and took the forbidden fruit from his wife Eve's hand and ate it.(Gen 3:1-6, 17)
Hence, the apostle Paul wrote: "That is why, just as through one man sin entered into the world and death through sin, and so death spread to all men because they had all sinned".(Rom 5:12) However, Jesus father was not Adam, but God, whose personal name is Jehovah.(Ps 83:18; Luke 1:31, 32)
So, Jehovah God gave to Jesus as his father that which he has always had - perfection. On the other hand, 1 Kings 8:46 is speaking of all the offspring from Adam, and of which there were no other ones on the earth. Even the rebel angels who fathered the Nephilim at Genesis 6, are imperfect, having materialized as men in order to have sex relations with women.(Gen 6:1-4; Jude 6, 7; 1 Pet 3:19, 20)
Only Jesus Christ was directly fathered by Jehovah God as a human, through Mary by holy spirit, for Joseph was not his father.(Matt 1:18-25) That is why Jesus told Nicodemus: "For God loved the world so much that he gave his only-begotten Son, so that everyone exercising faith in him might not be destroyed but have everlasting life".(John 3:16; Note: Jesus being "only-begotten" means that Jehovah God directly created him, unlike the angels who were created with Jesus as Jehovah's helper or "master worker", Prov 8:30; also note: the King James Bible failed to accurately render the Hebrew word amon at Prov 8:30, that means "skilled, i.e. an architect", that is properly rendered as "master worker", so that Prov 8:30 accurately reads: "Then I was beside him (Jehovah God) as a master worker (Hebrew amon, whereby Strong's Exhaustive Concordance says: "from H539, probably in the sense of training"). I was the one he was especially fond of day by day; I rejoiced before him all the time", New World Translation)
Thus the apostle Peter wrote: "In fact, to this course you were called, because even Christ suffered for you, leaving you a (perfect) model to follow his steps closely. He committed no sin, nor was deception found in his mouth. When being insulted, he did not insult in return. When he was suffering, he did not threaten, but he entrusted himself to the One (Jehovah God) who judges righteously".(1 Pet 2:21-23)