I don’t mind repetitive singing if you are singing Biblical words or verses, like Paul Wilbur singing “Kadosh.” It helps that he is a good, strong singer with decent music.
https://www.youtube.com/watch?v=bSMDz1fpHxE
He is indeed a good strong singer, backed by trained
musicians. Now imagine it sung by a couple hundred bad, weak voices, under the direction of someone who wants the song to last forever.
I have no problem with repetition itself. That’s an element of art. The elements can be used skillfully or poorly.