We really don’t understand sin.
“If we say that we have no sin, we are deceiving ourselves and the truth is not in us. If we confess our sins, He is faithful and righteous to forgive us our sins and to cleanse us from all unrighteousness. If we say that we have not sinned, we make Him a liar and His word is not in us.”
What does that mean? We are all sinners. You and me included. That is why we insist on acknowledging sin for what it is. God is the moral law giver. So we submit to His authority and seek His mercy which He has promised to give.
The real problem comes not in admitting our wrongs, but in denying that there is a wrong in the first place. That denial places us in a position of continual denial of Gods authority in our lives and His creation. Hence we admit that all things the Bible condemns are in fact sin. The right way of dealing with that sin is not a claim of the changing times, but admitting the sin and seeking His mercy found displayed at the cross.