Baloney.
There's not ONE church because the Orthodox and Rome disagree on major points of doctrine.
There's not One truth in Catholicism because Jesus and Scripture are THE Truth and Catholicism claims more.
And there's certainly not ONE interpretation because interpretations have changed over the millennia of RCC history.
There was only ONE Church that through Divine Inspiration assembled the books in the Bible. They did not fall from the skies and self-assemble themselves. It took over 300 years for the early Church fathers to sort out hundreds and hundreds of fragments and cross-check with the received oral tradition to tell us what the real written word of God is.
So if you doubt the interpretation of the Catholic Church, then you must toss out your Bible.
The ONE interpretation is in the Catholic Credo. If you don’t believe in the Eucharist and the role of Mary, then you may just as well be an atheist.