You do realize that every Sunday your priest gives his own personal interpretation of the scriptures ??
What your post is completely missing is that those personal interpretations may or may not conform 100% perfectly with the actual teachings of the Catholic Church.
The Catholic Church does not base it's teachings on some individual priest's personal interpretation of Bible texts, nor does the Catholic Church base it's teachings on some Catholic's private personal interpretation of the Bible texts they are reading. Those personal interpretations may or may not be correct in any given homily or in any given personal Bible reading.
The Church's teachings are based on the teaching authority of the Church which was given by Almighty God, and they are based on the Holy Scriptures and the Church's Magisterium, under the guidance of the Holy Spirit.
All priests should always be providing biblical interpretions which are totally compatible with the teachings of the Church, just like all the disciples of Jesus should have been teaching and living properly too, but they had this guy there named Judas...
Catholics can always check their priest's teachings against the real, official teachings of the Church, to see if he is speaking correctly about those teachings. Protestants cannot check their pastor's teachings against the official "protestant teachings", because there are none, only private interpretations of the Bible, which are all over the map (as that example clearly shows), and which are often completely contradictory, and mutually exclusive between different protestant denominations as well as between different protestant individuals.