This emphasis on New Covenant isn't new at all. The emphasis upon grace-through-faith (as opposed to moral duty or improvement) isn't strange and it isn't new. If it bothers you...if you wonder at it...or (heaven help us, I shudder at this) if you think it is in error...all I can say is...
...historically speaking, where have you been? There is a such thing as "the cult of the contemporary". Are you in that cult? Do you read? Or, if you read classically, do you read only the writings of dead "merit mongers"? That is most unwise. Have you read the New Testament without the veil on your head? Have you read church history?
“The doctrine of the atonement is very simple. It just consists in the substitution of Christ in the place of the sinner; Christ being treated as if he were the sinner and then the transgressor being treated as if he were the righteous one. It is a change of persons; Christ becomes the sinner; He stands in the sinner’s place…the sinner becomes righteous; he stands in Christ’s place…and is numbered with the righteous ones. Christ has no sin of His own, but he takes human guilt and is punished for human folly. We have no righteousness of our own, but we take the Divine righteousness; we are rewarded for it and stand accepted before God as though that righteousness had been worked out by ourselves.”
Preached long ago by Charles Spurgeon, The King’s Highway
When a woman or man, no matter their age, no matter how far from God they are, suddenly sees the atonement for what it is for the first time...and believes this scandalous gospel...they are saved. They can then, and only then, begin to grow up into the righteousness that has been purchased for them, and imputed to them.
Ah, but how can they hear, without a preacher? How will they hear if confused Christians keep on questioning the validity of this simple gospel?
The enemy's plan is old, but clever. Divide, and conquer. Divide, and thus keep as many as possible from being able to clearly hear this truth.