I can be Catholic and not be a Biblical literalist.
That's a disingenuous dodge.
This is not about literalism concerning a creation narrative or a prophetic discourse: we are talking about the plain words of Christ in a direct discourse to his disciples.
One cannot be Catholic and claim that the crucifixion was not an historical event but merely an allegory. Likewise one cannot claim that an unambiguous statement of Christ in a direct discourse (i.e. not a parable) is "just words on paper" and be a Catholic.
Moreover, no Catholic can claim that any part of the Scriptures are just words on paper, since the Church teaches that the Scriptures in their entirety are the revealed Word of God and are therefore to be received with the utmost reverence.