Socrates4Jesus;5838872]I think it has something to do with Jesus’ unique teaching style. He was, like Socrates, big on using symbolism (parables are just one example).
I think that this extensive use of figures of speech kept the Apostles guessing–so much so that when Jesus told them He was going to be crucified and rise from the dead, they did not understand what He was saying. The only way i can see that they did not understand Him would be if they thought He was using crucifixion as some kind of metaphor
Jesus said, just before his death:
I will ask the Father, and he will give you another Counselor to be with you forever— the Spirit of truth…
And, as you pointed out, Jesus also said:
“Though I have been speaking figuratively, a time is coming when I will no longer use this kind of language but will tell you plainly about my Father…”
I am sure that all Christians regardless of denomination, agree that this occurred on Pentecost:
*“And when the day of Pentecost was fully come, they were all with one accord in one place. And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting. And there appeared unto them cloven tongues like as of fire, and it sat upon each of them. And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.”
*
All was cleared up on that fateful day, including the doctrine of the Eucharist, and the holy spirit has been guiding Jesus’ one church ever since, and this one church built by God, as opposed to man, has steadfastly taught (since Pentecost) - that the bread and wine are in fact Jesus’ flesh and blood, once consecrated by the priest/bishop

If it’s just a symbol, please tell me why Jesus said:
“For my flesh is real food and my blood is real drink.”
Shouldn’t this fact really end the confusion, if in fact the holy spirit can be trusted? Or, did the holy spirit (spirit of truth) - fail to guide Jesus’ established church into all truth? If I can’t trust the church built by God, why would I trust a church built by mere men, 1600 years removed from Pentecost?
**The fact that the Apostles said this at the end of His mission on earth apparently indicates that up until this moment they were continuously unsure when He was speaking literally and when He was not. **
Even if that was the case, the crux of the matter is: all was cleared up on Pentecost! Whenever Jesus spoke literally or in metaphor, he always made sure his disciples understood the distinction, even if they didn’t fully grasp the meaning - e.g. John 6. Jesus knew all would be cleared up once the holy spirit descended upon His one fledgling church.
**I suppose that if even the Apostles were confused regarding the literal-or-figurative question, one should not blame Protestants for being confused, too.
**
Surely you must concede that any remaining confusion was cleared up on Pentecost, through the providence of the holy spirit, Who remains with Jesus’ established church until the end of time?
Non-Catholics, regardless of church affiliation, are our brothers and sisters in Christ and the only people worthy of blame, logically speaking, are the ministers/pastors of these man-made churches, teaching something that the church built by God, did not, does not support - not to impugn their work, of course! Any non-Catholic church spreading the news that we are saved by the blood of Christ, is an awesome church! However, these man-made churches simply fall short when it comes to the fullness of faith, in my humble opinion. Even in Paul’s day people were already turning to a different gospel, as was the case through almost every century, but the church built by God was/is impervious to such perversion, according to the holy bible.
“I am astonished that you are so quickly deserting the one who called you by the grace of Christ and are turning to a different gospel— which is really no gospel at all. Evidently some people are throwing you into confusion and are trying to pervert the gospel of Christ…”