The Eucharist is the central dogma of our religion. It is called the generating dogma of Catholic piety. It is not the papacy, as you seem to think.
The Papacy is nothing other than the word-bearer of Christ. Thanks to the Papacy, the faithful keep the dogma and morality taught by Jesus Christ intact. It is this protection that keeps us on the right road, precisely marked out by our Divine Founder. But it is only Christ that remains, the Way, the Truth and the Life.
Now, Christ is not a Being who disappeared someplace we do not know of, nor even the far away Being that we think of. He is alive. He lives among us. He is present in the Eucharist. And this is why the Eucharist is the base, the centre, the heart of religion. From whence comes every life. Not from anywhere else.
You do not believe it. But we believe it. We believe firmly, resolutely, from the depth of our being, that in the tabernacle of each of our churches, God truly resides under the appearance of the Host.
Dom Jean Baptiste Chautard, Abbot of Sept-Fons to Georges Benjamin Clemenceau, Prime Minister of France, in a dialogue related in the former’s Les cisterciens Trappistes, l’âme cistercienne.
(h/t to Rorate Cæli.)