"If lower court judges won't challenge previous SCOTUS decisions, then the SCOTUS will never have an opportunity to review and correct its previous errors."
Pretty sure it's not up to a lower court to "challenge" a higher court, unless it's in the context of a case. Here, she was answering questions in a vacuum. Perhaps Billybob can clear this up, or one of our other lawyers.
Well, of course.
That's the way the system is supposed to work, isn't it?
A lower court can't directly overturn a SCOTUS ruling on a case.
But they can certainly judge similar cases on their own merits, and force the SCOTUS to either reaffirm or overturn previous decisions.