How about because Jesus said so!!!!! Col 1:25 Whereof I am made a minister, according to the dispensation of God which is given to me for you, to fulfil the word of God;
Col 1:26 Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints:
Col 1:27 To whom God would make known what is the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory:
Why do we need a Eucharist when we already have Christ within us???
And we have God’s one holy, apostolic and Catholic Church. The Church of saints, martyrs, and stigmatists, and the Church that through Petrine authority assembled the definitive books on the Bible through infallible interpretation.
There is no Petrine authority...It's a fable...
Why do we need anyone else’s interpretation?
That's part of the fable...We don't need anyone's interpretation...All we have to do is study and believe what we read...
Before Protestantism, under Petrine infallible authority, the Catholic Church assembled the definitive books on the Bible: Council of Synod AD 382. The Protestant Reformation spawned a cluster of heresies where every Tom, Dick, and Harry, and their milkmaid purport to interpret the Bible came ELEVEN centuries later. No need for “born again” before 1517 and no need for born again now. Belief in the Eucharist is enough. The rest is all vapid nonsense.