These are repeated by the same people over and over. Not at all. They are repeating what they love and mean. In fact, repetition is difficult when people don't mean what they are saying. This is true of every aspect of worship.
Repetition is a way of learning basic elements of anything, including worship.
Most Christians don't know how to worship because they have been led to believe that it comes naturally. It doesn't, no more than anything in the Christian life come naturally. It must be learned. And, since repetition is the most basic way of learning, the worship service involves repeating certain important parts. This page, and the attached pages on worship are copyright materials of the Reformed Episcopal Church.