Just one more thing.   Their is a significant reason why... for centuries, the pipe organ has been THE liturgical instrument of the church. It call spell out the harmony of a hymn  or chant unlike any of your "collective instrumentalists, or ensemble."  It can provide the volume  essential to LEADING not accompanying a congregation. It has the capacity to set different moods for a prelude, interlude or postlude.  It can accompany a cantor, small vocal ensemble or full choir   and congregation unlike any of your  guitarists, flutists, drummers or other.
Their is severe ignorance in the Roman Church as to how , what, where  and why the church in previous generations and centuries  has used this medium.