Just because the Church favors something doesn’t make it right. The Church has been wrong plenty of times (Galileo… ect.). If I’m not mistaken (and I very well could be), it actually took the Church 'til 1992 to officially revamp their statement on the Earth being the center of the universe.
Any citations for that?

Galileo was wrong in his specifics: the sun is
not the center of the
universe. (More details
here.)
The same can be true for people who come to watch Gregorian chant, although I’m not aware of anyone that would actually want to come to watch that.
I would go to a Mass with Gregorian chant over a Mass without it, because the Mass
with Gregorian chant would a) be in greater continuity with the Roman liturgical tradition (including the reformed rite of the Mass), and b) allow me to have fuller participation.
Singing in Latin, and actually saying the Mass in Latin, to me, sound like exclusive gestures. We’re sending the message that if you don’t know our fancy language, you’ll have no idea what’s going on or what to do.
It’s not exclusive; Latin is meant to be inclusive, because as Catholics of the Latin Rite, it’s the language proper to our liturgy, and we should all be comfortable chanting or speaking the responses in Latin. (That’s what the Church says, at least…) What’s exclusive is having an English Mass, a Spanish Mass, a Korean Mass, and a Portuguese Mass in the same parish. Save your nationalism and your differences for personal or group piety: let the Mass truly present the universality and the union of the Catholic Church.
And as for having “no idea what’s going on or what we do”, perhaps this is a deficiency of the modern form of the Roman Rite, that
actions have been reduced and
words have been increased (in an attempt to explain the actions – both removed and retained). And along with this comes the incorrect notion that we
should understand everything at Mass, and that there is no longer a mystery… or that if there is still a mystery, our language needs to be simplified more.
Contemporary music is not chipping away at the rock to put in a hot tub. It’s building an above ground pool. You’re taking the music we’ve already got and building on it. Keep in mind this is centuries of building, but still building.
I might be wrong here, but I don’t see how much of our contemporary music is “built on” Gregorian chant or polyphony.
It’s also worth remembering that Jesus was a total radical.
No, he wasn’t.
He didn’t get caught up in the grandeur of the religious zealots. He was practical and to the point.
He taught in parables. He drew in the sand. He spoke enigmatically. He answered questions with questions. He prophesied his glorious resurrection and ascension into heaven.
I think the church is losing some of that with all the majestic ceremonies we have.
Our liturgy is meant to reflect heavenly realities, where there is definitely majesty, and glory, and “ceremonial”, and grandeur.
There are some people who claim the Catholic Church has “protestantized” its liturgy by simplifying it and dumbing it down and losing much of its sense of mystery; your statement here is an affirmation of their fears. The
Don’t get me wrong, God is 100% worth that, but whenever I sit through some extravagant Mass or service I’m always thinking how we could spend our time actually helping the poorest of the poor and reaching out to the least of the world instead of just praying for them.
It’s not an either/or. It’s not “just praying for them”, it’s praying for them
and acting upon our intentions. It is our worship of God that drives our charity: without it, Christians acts are merely humanitarian acts.
I believe that music can lighten the soul and should be used to reach to those people inside and outside of Mass. That is something Gregorian chant can’t do.
I disagree that Gregorian chant can’t do that.