"To abide or adhere to decided cases. It is a general maxim that when a point has been settled by decision, it forms a precedent which is not afterwards to be departed from. The doctrine of stare decisis is not always to be relied upon, for the courts find it necessary to overrule cases which have been hastily decided, or contrary to principle. Many hundreds of such overruled cases may be found in the American and English books of reports."
The real issue is Roe v Wade, is it not? They threw this out at Roberts, too, and he answered by-th-book. That particular decision -- and many others in the SCOTUS -- was arrived at using 'faulty law' or, rather, law applied using faulty method, if I may paraphrase Mr. Roberts.
what source are you quoting?