Even with a 52-card poker deck, we all understand on some level that the odds of drawing the exact same 52 cards in a row are astronomical. The Tarot has 78 cards, and considers "reversals," or the card upside-down, akin to a separate card. In other words, the Two of Cups is meaningfully distinct from the Two of Cups, Reversed.
I believe it's hard to truly understand just how many possibilities there are without seeing it. Like I mentioned, we all have some awareness that each shuffled deck will draw differently. But when we see the different decks laid out before us, I think we can be struck by the sheer magnitude of the odds. The chances of drawing the exact same 78 cards in a row are 1 in 11324281178206297831457521158732046228731749579488251990048962825668 835325234200766245086213177344000000000000000000, and that does not factor in the concept of reversals. This project is an attempt to give people a glimpse into that which, to our human minds, is essentially infinity.