Think of it this way: every sport has its own guidelines, its own parameters, and its own routines; And yet no two games are exactly alike. Likewise, just because the mass follows a set pattern does not doom us to monotony. Instead, if you learn the rhythm of the mass and keep an eye out on the details then it becomes a living process in which we each have a role to fulfill.
To best understand how the diversity of worship styles evolved we took a quick look at the Christian family tree. The farther one moves away from the Apostolic Church (which "subsists" in the Catholic Church) the more divergent one finds the worship styles to be.
Once you move beyond the Protestant Reformation the denominations are governed by a principle of Sola Scriptura, that is, "Scripture Alone" is the source of authority. Therefore the worship services are going to be much more centered on preaching and even take on a "Bible Study" format in some cases.