They savy criminal argument doesn't pass constitutional muster.
You could say "allowing criminals to not testify against themselves could frustrate law enforcement because a savy criminal could just commit everything to memory."
The 5th ammendment clearly says "too bad, those are the rules."
It's not a "reduction to the absurd". It brings up the point that there is no "essential law enforcement" interest that overrides the right to avoid self incrimination. No matter how badly someone wants to convict you, you have a right to not give testimony against your self against your will.
You could say "allowing criminals to not testify against themselves could frustrate law enforcement because a savy criminal could just commit everything to memory."
The 5th ammendment clearly says "too bad, those are the rules."