Your church's man made tradions are nothing more than legalism that puts the focus on your religion instead of God...
So who do we listen to, your church, or God??? That's easy for some of us...
The Church's organic development demonstrates the timelessness of God in the Trinity - and soothes the soul in the offing. Truth be told a lot of the music developed as a direct result of the architecture of whatever time period that was ephemeral. Medieval churches have high, high vaulted ceilings to inspire the faithful to achieve Heaven and chant not only reflects that, but is a form of music that works in that space. Without modern amplification, the words needed to be heard. The same with Renaissance and Baroque. I had the privilege of singing Vivaldi in the church where he worked in Venice and his work sounds so much better there than anywhere else I've sung it. The same with Galluppi in Venice. Different church, but you could tell the music was written for it.
Aside from that, chant is part of our heritage and connects us to the communion of saints in such a special way. So many who have gone before us have sung the same words with the same notes and all for the same reason - to worship and adore God in the Father, Son and Holy Spirit. Well, and of course, the Salve Regina. That one's absolutely gorgeous and works in any church any time.
What is your current knowledge about the Mass?
Where/when/how did you learn that?
What is your current understanding of the events during the Mass?
Where/when/how did you come to understand that?
Have you ever studied the Catechism of the Catholic Church to see what the Church teaches?
Have you examined its statements and done a systematic point-by-point rebuttal of them?