Perhaps in your interpretation of the Bible, but the Catholic Church interprets it, in particular the words “do this as a commemoration of me,” as the institution of the Eucharist and the ministerial priesthood.
From the Council of Trent, Session XXII:
Chapter 1
… [Jesus], therefore, our God and Lord, though He was by His death about to offer Himself once upon the altar of the cross to God the Father that He might there accomplish an eternal redemption, nevertheless, that His priesthood might not come to an end with His death, at the last supper, on the night He was betrayed, that He might leave to His beloved spouse the Church a visible sacrifice, such as the nature of man requires, whereby that bloody sacrifice once to be accomplished on the cross might be represented, the memory thereof remain even to the end of the world, and its salutary effects applied to the remission of those sins which we daily commit, declaring Himself constituted a priest forever according to the order of Melchisedech, offered up to God the Father His own body and blood under the form of bread and wine, and under the forms of those same things gave to the Apostles, whom He then made priests of the New Testament, that they might partake, commanding them and their successors in the priesthood by these words to do likewise: Do this in commemoration of me, as the Catholic Church has always understood and taught. …
Canon 2. If anyone says that by those words, Do this for a commemoration of me (Luke 22:19; I Cor. 11:25), Christ did not institute the Apostles priests; or did not ordain that they and other priests should offer His own body and blood, let him be anathema.