Why do Mass readings end with “the Word of God” when the words were written by regular people, not God?

https://traffic.libsyn.com/forcedn/anunslife/RNC-as236-dec-03-2021-word-of-God-mx-shannon.mp3
Podcast Recorded:

A reluctant church-goer asks why the Catholic Mass implies that God is the writer of the bible when that’s not the case. Hear the full Ask Sister episode AS236 at aNunsLife.org. Hosts: Sister Maxine and Sister Shannon.

A reluctant church-goer asks why the Catholic Mass implies that God is the writer of the bible.