Good for the guy. Guess he’s taking to heart the Bible’s warning against “vain repetitions”. Chanting is prevalent in cults.
We have R.C. friends, and when they say grace before meals, the prayers are personal, pertinent to specific issues in their/our lives, heartfelt, and end praying “in Jesus’ name”. The guy studied many years for the priesthood, and then started to read the Bible. They still attend a Catholic church because of their heritage, but have many issues with it — rote prayers being one. They don’t “do” the Mary-worship thing, either.
Matt 6: 7-9 And when you pray, do not heap up empty phrases ( vain repetitions) as the Gentiles do, for they think that they will be heard for their many words. Do not be like them, for your Father knows what you need before you ask him. Pray then like this: Our Father in heaven, hallowed be your name
I think you misunderstand the warning against vain repetitions. Context is always important.
Even denominations that pride themselves on not using the same prayer repeatedly, always use the same prayers repeatedly. They just repeat their own words rather than inspired words.