Maggie's Farm

The worship music of the Taizé community includes historic western medieval and renaissance era chant, chant from Eastern Orthodox churches, and modern compositions that use lines that are simple both in language and musical phrasing, often repeated.
It comes from a monastic community, where emphasis is on simplicity and contemplation.
Simple repeated forms can function like a mantra helping one to focus on God rather than on one's own issues and problems. A form of meditation, losing oneself in a group activity of worship.
As one of the traditional foundational documents of English protestantism puts it, our purpose is to revere and adore God. One can guess from reading the book of Revelations in the New Testament that the chief occupation of all souls in heaven will be singing praises to God. I think it rather irreverent of Joseph Allen in his Taki article Jesus Returns (in a Tour Bus) to say
Praise is what people who love got will do. I don't think the attendees were violating Matthew 6:1; rather they were taking to heart Ephesians 6:19-20.
Now, I myself often joke that the typical evangelical or pentecostal praise song goes like this:

Yet under the right circumstances, (perhaps involving large groups such as the Taizé community, World Youth Day, or arena shows with loud bass beats) there is a real physical charge to participating with many others in using such words in song to revere God. It gets endorphins active, changing our biology to make us feel good. Yea verily, this is part of why people like sing-along-Handel's Messiah performances and rock concerts, which usually have no overt spiritual component to speak of. If our belief and faith is nothing more than the feel-good chemicals resulting from the haptic response to the acoustical energy in the room, then it is pretty shallow. But I don't see anything wrong with people participating in the sorts of events that make them feel closer to God. For some, those events will be praise involving quiet meditation. For others, noisy meditation.
I'm also conscious that people who express themselves through creation and performance of music will want to express their love of God, reverence to God, and thanks to God using the tools that they are most intimately familiar with. And I often snicker when the expressions of στοργή and ἀγάπη have inadvertent double entendres if perceived as expression of what CS Lewis called wɛnʊs type love (sexuality). I might not like their style of music, I might wish for more sophisticated expression. Yet I recognize that for others it will be just the thing that speaks to them and evokes feelings that help them connect with God.