Unless God absolutely failed in both His creation and His redemption sin and death are NOT part of humanity. I Corinthians 15:56 The sting of death is sin, and the strength of sin is the law. 57 But thanks be to God, who gives us the victory through our Lord Jesus Christ.
CDL
I read the full context of 1 Corinthians 15:56 and the presiding verses before it.
From my understanding of what the 1 Corinthians 15:56, Paul speaks about the relations between sin, death, and asking the Corinthians to “There, my beloved, brethren, be steadfast, immovable, always abounding the work of the Lord, knowing that in the Lord your labor is not in vain.”
God did not failed in his creation, and redemptive works. As I stated numerous times that, as mortal men and women, we have a free will do “right and wrong.” By doing the right, we are rewarded, by doing the wrong, we are condemned.
Suppose you are right that we humans are not sinners then how to you explain Matthew 25:31-46?
“When the Son of man comes in his glory, and all his angels with him, the he will sit on his glorious throne. Before him will be separate them from one another as sheperd separates the sheep and the goats, and he will place the sheep at his right, and the goat at his left. Then the King will say to those on his right hand, “Come, O blessed of my Father, inherit the the kingdom prepared for you from the foundation of the world, for I was hungry and you gave me food, I was thirsty and you gave me drink, when I was a stranger and you welcome me, and I was naked you clothed me, I was sick and you visited me, I was in prison and you came to me.” Then the righteous will answer him, “Lord, when did we see thee hungry, and feed thee, or thirsty and give drink, And when did we see thee a stranger, and welcome thee, or naked and clothe thee? And when did we see thee sick or in prison, and visit thee?” And the King will answer them, “Truly, I say to you, as you did it to one of the least of these my brethren, you did it to me.” Then He will say to those on his left hand, “Depart from me, you cursed, into the eternal fire prepared for the devil and angels; for I was hungry and you gave me no food, I was thirsty and you gave me no drink, I was a stranger, and you did not welcome me, naked and you did not clothe me, sick and in prison you did not visit me.” Then they also will answer, “Lord, when did we see thee hungry, or thirsty, or a stranger, or naked or sick, and did not minister to thee?” Then He will answer them, “Truly, I say to you, as you did it not to one of the least of these, you did it not to me.” And they will go into the eternal punishment, but the righteous into the eternal life.”
As you can see. God divided the sheep and the goat. The sheep are righteous men and women who remain obedient to God’s will and by doing good deeds. The Goat are the sinners who did nothing. If you say humans are not sinners then who are goats in the parable?