Utter nonsense. Your logic, as is your Biblical understanding, is lacking.
Turn to Gal 3:13 "Christ redeemed us from the curse of the Law, having become a curse for us...."
Christ took "the curse of the law" upon Himself. His death was our death (see Rom 6:6/7:4)
Now turn to Gal 4:4 "But when the fullness of the time came, God sent forth His Son, born of a woman, born under the Law, 5 so that He might redeem those who were under the Law, that we might receive the adoption as sons..."
Christ came so that He could legally deliver the fallen, Adamic race from condemnation to justification of life. See Roman 5:18.
Before you were saved you stood condemned under the law of God. When you accepted Christ you went from under law to under grace and mercy.
However, you are saved from under the law as long as your faith remains in Christ. As long as your faith remains Christ will represent you perfect in Himself, but if you fall away Christ can no longer represent you perfect in Himself. At that point your must stand before God's law without an intercessor. That means you go back under the very law He legally delivered you from.
[Demeaning language edited]