We can’t put God in a box. The earliest Christians also believed. If you see that the victim of the lamb was eaten in the old covenant why not a benign presence in the way Christ is the victim leaves no real room for doubt in the passage. If Christ is the Great I Am which means he is truly always present outside of the creation{ Time and Space,planets and cosmos} which is another mystery. Its not too far a stretch to see the representation of the same sacrifice thru out the march of time since his presence can be everywhere. Why because he is not locked down to time like us. There’s no way this is made up only a God could introduce the eucharist- Its just that deep. Thats why a lot of people are confused. You know like our independent church brothers. I personally did not understand until later in life. What an Awesome God indeed!