What hope is there?

Those in musical ministry know that funerals, (and the increasingly common memorial Mass,) are among the most trying of our programming duites.
Two facts: recent praxis has encouraged mourners, regardless of knowledge or of expereince or even of their faith, to become de facto liturgists; and the growing secualrazation of society leading to congregations at funerals (and weddings, while we're at it,) are, in large part, completely un-churched; combine to make what is already hard more difficult.
Trying to minister to mourners and at the same time preserve the integrity of the Holy Sacrifice of the Mass sometimes seems like a losing battle.
What hope is there with such ignorance as this: "Unlike the readings, there is no set music repertoire for funerals"?
http://www.ritemagazine.org/resources/0707ReproRsrc.pdf
It seems extraordinary to me that an adult Catholic would be utterly unaware of the existence of the May the angels/In paradisum, and indeed, that besides this unique situation - a prescribed RECESSIONAL in the Roman Rite -- there ARE prescribed texts for the final commendation, for the introit, the communion, even the offertory; and further, that these texts, at least in the original, do in fact have their own prescribed music. (That deviation from them is allowed is no more pertinent than the fact that virtually unlimited choices are offered for the 5 [NOT 3!] pericopes that comprise the Liturgy of the Word at funerals.)
We will never get away from the How Great Thou Arts, and "Mom's favorite song was 'Somewhere Over the Rainbow, where can we fit that in?"s, and Oh When the Saints, when we have such ignorance from someone who purports to know a little something about liturgy.
A Catholic priest.
Not just a Catholic priest, a pastor.
Not just a pastor but a professor of liturgy and sacraments at a Catholic University.
And, incidentally, one who someone thought was good enough to present him with the forum of a major publication from LTP.
Really, what hope is there?