Why should Christians avoid returning to the Old Covenant practices?

Christ's death and resurrection rendered the Old Covenant's sacrifices obsolete, yet some believers may be tempted to return to these practices out of tradition or misunderstanding. Hebrews 10:4 states that it is impossible for the blood of bulls and goats to take away sins. Engaging in these Old Covenant practices overlooks the sufficiency of Christ's one-time sacrifice and disrespects the fulfillment He provides. Thus, Christians are called to embrace the New Covenant, which is based entirely on faith in Christ, who is our all in all, rather than reverting to rituals that can no longer achieve what Christ has already accomplished.