There are also specific reasons why the “structure” of the Mass is the way it is.
Take a quick read through this article above^
Here is one excerpt:
The Biblical Roots of the Liturgy
Msgr. Charles Pope • November 26, 2017 • 1 Comment
Catholics are often unaware just how biblical the Sacred Liturgy is. The design of our traditional churches; the use of candles, incense, and golden vessels; the postures of standing and kneeling; the altar; the singing of hymns; priests wearing albs and so forth are all depicted in the Scriptures. Some of these details were features of the ancient Jewish Temple, but most are reiterated in the Book of Revelation, which describes the liturgy of Heaven.
The liturgy here on earth is modeled after the liturgy in Heaven; that is why it is so serious to tamper with it. The Book of Revelation describes the heavenly liturgy and focuses on a scroll or book that contains the meaning of life and the answers to all we seek. It also focuses on the Lamb of God, standing but with the marks of slaughter upon it. Does this not sound familiar? It is the Liturgy of the Word and the Liturgy of the Eucharist.
We do well to be aware of the biblical roots of the Sacred Liturgy. Many people consider our rituals to be empty and vain, “smells and bells.” Some think austere liturgical environments devoid of much ritual are “purer” and closer to the worship in “spirit and in truth” that Jesus spoke of in John 4.
To such criticisms we must insist that our rituals, properly understood, are mystical and deeply biblical. Further, they are elements of the heavenly liturgy since almost all of them are mentioned as aspects of the worship or liturgy that takes place in Heaven. In this light, it is a serious mistake to set them aside or have a dismissive attitude toward them.
With that in mind we ought to consider the biblical references to the most common elements of Catholic and Orthodox liturgies. I have added my own occasional note in red.