Except that a grand jury has to sustain that the charges are at least "better than tenuous". Once the case is resolved one way or the other the defendant can't be tried for it again (Constitutional 'double jeopardy') so the prosecutors have to bring any charges that can hold up (this is why Federal sentencing is wonky as well).
> Avoiding trials altogether because of the structure of the legal system is the wrong approach. Improving the expediency by which the legal system can provide justice is the right approach.
Uh, plea bargains are the #1 way the system is made more "expedient", you can't have your cake and eat it too. Feel free to continue putting words into my mouth about "sanctioning miscarriage of justice" though.