As for things like the Protective Jade Talisman and Gathering Qi Pill, their aristocratic family's heritage of tool refining and pill concoction had long been lost; they no longer had the ability to create these treasures.
Even if the members of these Cultivator Aristocratic Families wanted to obtain these things, they needed to find professional tool refiners or alchemists from Hidden World Sects, and they would only be able to create some low-level, substandard items.
Top-grade items were extremely rare, and very few Hidden Cultivation Sects possessed them. Even when they did, they were used internally and were never sold to outsiders.
However, even such low-quality items, once they surfaced, would incite countless wealthy nobles to scramble for them, and could even provoke others into looting and killing for them.