Why this niche is a good test
Tarot and astrology is one of the most saturated content categories on the web, and one of the worst served. Search results are dominated by pages that answer the query in the title and then pad for eight hundred words, or that gate the answer behind an email form. The queries themselves are enormously varied and long-tailed — every card, every pairing, every sign, every combination of the two.
That makes it a genuinely useful place to test a publishing system rather than a publishing habit. If the architecture works, you can cover a long tail no individual writer could reach by hand. If it does not, you produce several hundred pages of near-duplicate text and Google ignores all of them. Both outcomes are informative, and the second one is the common one.
