Essential Numerology

Hi Tarotiers! I often think about simple numerology when approaching the Tarot. Simple in that, there are only 9 numbers, and everything that has existed, does exist, or ever will exist - is comprised of these 9 numbers. In Kabbalah that's Yesod, the foundation. Anyways, I often wonder if the 'real deal' cards are chiefly from I - The Magus to IX - The Hermit, and all the rest are these 9 modalities mixed in various quantities. I know the BOTA used to lay the cards out in files of seven, but I wonder if there isn't something really significant about those first 9 Major Arcana. Would love to hear your perspective! 🦄🫡