I would conclude the USSC is afraid of the issue.
I would conclude that no conservative constitutional attorney of any note has taken up the eligibility issue and written a Petition for a Writ of Certiorari (request for an appeal to be heard) of significant legal weight to interest four conservative members of the court. (It takes four Justices to agree to hear a case by granting a Petition for a Writ of Certiorari).
Judges with lifetime appointments have no need to fear anything related to their job.