Yes it’s rock-style, repetitive, and loud . . . it’s called 24/7 music: 24 times they repeat 7 words
In all seriousness, the repetition is largely meant for the newbies. Churches have had some criticism over the years of people deciding to attend church, only to be unfamiliar with the songs while the regular attendees were expressive in their singing. Even with a hymnal (which a lot of people have trouble reading) it can be tough for someone visiting church. People visiting felt like they were on the outside looking in.
We call it “7-11”.
Ha!
Sounds more like “Hypnotic” to induce suggestive hearing.