Not that easy. If the catholic wants John 6:53-57 to be literal then the passage with the rich young ruler has to be literal as well. You have to sell everything. You can't have it both ways.
Ok. Let everything be literal, but the Catholic Church says there are many different forms of writing in the Bible.
Some are literal, some allegory, some parables, some history, etc.
In the parable of Lazarus and the rich man Jesus uses human experiences of life and human experiences of death to teach that one’s life affects one’s fate, that one’s fate is sealed at death, and that those who will not listen to God’s word will not take heed of his own Resurrection either.
If the John 6 passage is to be literal, then ALL of it should be taken literally, not just the parts you like.
That means that people who literally eat the body and blood of Jesus literally never die.
I've yet to meet that 2,000 year old Catholic.
Even Peter died.