... the Holy Ghost is something that propagates from the Apostles and through the Apostolic Church. ... that the Chruch is protected from error by the Holy Ghost and that lay interpretation is not similarly protected and is in fact a foolish enterprise.
Yes, -- so what is the question?
The Holy Ghost is given by Christ to His disciples physically present at His resurrection who are instructed to teach others. The usual Protestant interpretation says that the Holy Ghost is given all Christians directly. This is without warrant. We have the Holy Ghost inasmuch as the Church of the Apostles informed us.