The least the composers could do is write music in a tessitura that actualy compliments the voice.
One of the things you need to remember about church music is that it can be very ephemeral and only the best of any one period survives to teach the next generations what music can do in the way of adding to worship. We're witnessing that first hand with the Jesuit stuff. Most of it was (and is) plain and simply badly written and it is (thankfully) going by the wayside. Not much of it is going to survive the current generation because it's just bad, leaving us with the great classics and chant.
Schutte has actually written a couple of decent pieces of music. The biggest difficulty with him is that only rarely does he write decent music AND use lyrics which are doctrinally orthodox and unambiguous.
As you astutely observe, this, too, shall pass. His music, like that of others which is 'au courant,' has a stylistic mark--a sort of dispassionate glamor--glossy, but no substance--which cannot endure.
Even Faure's Requiem, as laid-back a funeral mass as there is, had more passion and underlying BELIEF than DannyBoy's stuff.