There was never one tarot sequence. Fifteenth- and sixteenth-century Italy produced several, and the differences between them are the best evidence available about what the trumps were for.
Scholarship distinguishes a small number of regional families, associated broadly with Ferrara, Milan and Bologna. They agree on which cards exist. They disagree about where the virtues sit, where the celestial cards sit, and which card ranks highest, in some orders Judgement is last, in others the World. That is not a trivial variation. It is a disagreement about the end of the world.
Two conclusions follow. The first is that the sequence cannot encode a fixed doctrine, because the people using it did not share one. A hidden teaching that different cities scrambled independently is not a hidden teaching. The second is that the order most readers use, the French one standardised in printed patterns and inherited by every occult deck since, is one survivor among several, and it survived for commercial and geographical reasons rather than doctrinal ones.
This does not invalidate reading the Major Arcana as a progression. It is a genuinely productive way to work, and the modern journey reading, Fool to World, through experience to integration, is a real interpretive achievement. But it is an achievement of the last two centuries, built on a printer's ordering, and describing it as the cards' original design is the same error as the Egyptian story in a more respectable coat.
The honest formulation is available and costs nothing: this is how we read the sequence, and this is when we started.