You’re misguided on the salvific grace of the Eucharist. We Catholics have had it since the last supper.
In Matthew 26:26, He said, “Take and eat; THIS IS MY BODY.”
In Matthew 26:27-28 He said, “All of you drink of this; FOR THIS IS MY BLOOD OF THE NEW COVENANT, WHICH IS BEING SHED FOR MANY UNTO THE FORGIVENESS OF SINS.”
In Mark 14:22-24, are recorded, “Take; THIS IS MY BODY”, and “THIS IS MY BLOOD OF THE NEW COVENANT, WHICH IS BEING SHED FOR MANY.”
In Luke 22:19-20, are recorded, “THIS IS MY BODY, WHICH IS BEING GIVEN FOR YOU; DO THIS IN REMEMBRANCE OF ME”, and “THIS CUP IS THE NEW COVENANT IN MY BLOOD, WHICH SHALL BE SHED FOR YOU.”
St. Cyril of Jerusalem, Catechetical Lectures, 22(Mystagogic 4)6, 350AD
“Do not, therefore, regard the Bread and the Wine as simply that; for they are, according to the Masters declaration, the Body and Blood of Christ.”
St. Gregory of Nyssa, The Great Catechism, 37, 383AD
“Rightly then, do we believe that the bread consecrated by the Word of GOD has been made over into the Body of GOD the Word.”
St. Ambrose of Milan, The Sacraments, 4:4:14, 390AD
“You may perhaps say: “My bread is ordinary.” But that bread is bread before the words of the Sacraments; where the consecration has entered in, the bread becomes the Flesh of Christ.”
St. John Chrysostom, Homilies on the First Corinthians, 24:4:7, 392AD
“When you see the Body of Christ lying on the altar, say to yourself, Because of this Body I am no longer earth and ash, no longer a prisoner but free...This is that Body which was blood-stained, which was pierced by a lance, and from which gushed forth those saving fountains, one of blood, the other of water, for all the world. This is the body which He gave us, both to hold in reserve and to eat, which was appropriate to intense love.”
The Eucharist is the source and summit of our faith. If you don’t believe that then your church went off the rails.
Funny, but I don't recall our Lord Jesus ripping off His finger to give it to them. The idea that the bread and wine become the actual body and blood of Christ is a bit silly in my mind. I don't think anyone at the Last Supper actually believed they were eating the flesh and drinking the blood of our Lord Jesus as He was sitting right with them.