I have no idea what you mean by "Juris dictum." Are you referring to "jurisdiction"? If so, how is jurisdiction destructive to our Republic?
As for stare decisis, it gives a great deal of predictability to the legal landscape, which facilitates investment. No one would risk any money in any business enterprise if all the legal rules could change overnight.
Also known as "instructions to the jury". Not sure where I picked up the short form of the Latin from. These insure that a jury can only find one verdict, that which the judge wants.
For reference, see the recent case in New Jersey where a judge refused to allow the jury to see the text of the law to force a conviction.
It also precludes people from seeking standing if new evidence casts doubt on previous decisions. Heller going up against Miller type decisions for example. Not to mention revisiting Wickard V Filburn.