What’s your point? How many Catholics left their parishes in the 1970s when the guitars came out? I now attend St. Agnes in NYC - a conservative community that meets all my needs. Many Catholics do that.
Guitars are not moral issues or major blatant sin.
Guitars are not molesting boys the night before doing a mass.
That is odd. When I was growing up, we went to many churches where the guitar was the only music. I even attended two which had guitars, organ, accordion and one had drums. Everyone loved God’s music. Now I go to a church which has a full orchestra. Why would anyone hate a church for having different kinds of music?