How did Dickerson v. United States preserve the Miranda rule?

In the 2000 case Dickerson v. United States, the U.S. Supreme Court preserved the Miranda v. Arizona rule by affirming its status as a constitutional requirement that Congress cannot override by statute.12

Although critics had long argued that the Miranda warnings hindered law enforcement, the Court—led by Chief Justice William Rehnquist—rejected the attempt to replace these procedural safeguards with a simple "voluntariness" test. By ruling that Miranda established a constitutional rule that is "part of our national culture," the Court effectively barred Congress from legislating away the requirement that police inform suspects of their rights before custodial interrogation. This decision solidified the Miranda warnings as a fundamental protection for the Fifth Amendment privilege against self-incrimination.12