ISB ~ Galatians 2 v21

died to no purpose:Paul reasons that if the Mosaic Law had been sufficient all along to remove sin, establish us in righteousness, and bring us into God’s family, then the Cross would have been completely unnecessary (3:21).

• The Law can neither remit sin nor triumph over eternal death nor free those held captive because of sin. Christ died to provide those things that the Law could not (Ambrosiaster, Commentary on Galatians 2:21).