It's the music business lingo,
Words mean things. A Church is not a Theatre, a Sanctuary is not a stage. Churches and theatres may both be wired with electrical audio equipment and have definable acoustic characteristics; that doesn't make them the same thing. I think it's a sign of, at best, sloppy thinking to use theatrical language when perfectly good eclesiastical languange exists. And yes, old Churches have great acoustical properties. Gee, I wonder why...
I've been looking at copyright notices in missalettes (and Music Issues) for many years. I've noticed the same thing. Can we say "Follow the Money"? And every few years, they revise the lyrics to advance the agenda of the feminists and the anti-God crowd. And renew the copyright.
Hypocritical indeed. ""Music ministers" are specifically told that Mass is not a performance." They sure don't act like it. And no, I'm not talking about those who make good (often, but not always "classical"1) as a "Communion Meditation". More like the ones who insist on cramming their chorus and downbeat-combo-band into the sanctuary; a poor fit both geometrically and liturgically.
AB
1) I use the term very loosely.
No small point. Paper (with the little recycle symbol on them no less) "missalettes". It is not enough to just put the music there, OCP is unofficially taking control of the liturgy by putting their music in with the Mass in disposable missalettes! Many, many Protestant converts I know absolutely hate this! The Word of God in a disposable package to be renewed every several months via a subscription. Profit motives are definitely in play here.
I also understand that OCP has a team traveling the country leading "classes" for "planners of Liturgy" or whatever they are called, and thereby affecting the Holy Liturgy in many parishes throughout many dioceses throughout the country. Why are the Bishops allowing this to happen? The Holy Liturgy "performances" are being planned by untrained (theologically speaking) "esperts" who have never even read the GIRM, which is the official plan for the Holy Liturgy in the Latin Rite of the Church.