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.