Read your own post to find the answers to your questions. You wrote it. Two words! Holy Spirit. Why is it such a stretch for you to believe that He also speaks to the Catholic Church?
The Holy Spirit speaks to individuals.
How could He speak to an organization?
Is the Catholic church a single entity that can exist without its members?
If you took away all the people, where would the Catholic church be?
So if He speaks to the *church* does He say the same thing to all the people at the same time?
He will never dwell with an organization that practices paganism.