Other theories would include that the piano was a newcomer, and the older generation did not like the young generation's music. Or the piano was too rhythmic, detracted from the "flow" of the ancient chant that was still being used. Or that something else happened at the same time. It is standard musical history that this is the same time as music changed from being paid for by the church to being paid for by secular welathy patrons. Or that this was the time of revivals (like Methodism); many people consider revivals inherently wrong, as drawing too many insincere people.