The moat logic of a scarce supply chain is built on a hidden premise: assuming that controversies will only circulate within small circles and require no large-scale external explanation. But this premise creates another structural vulnerability: when sales volume is extremely small, there are no aftermarket suppliers, repair shops, or developers whose livelihoods depend on this ecosystem, and therefore no third party has commercial incentive to voluntarily defend the brand during a crisis. In contrast, brands that have sold hundreds of millions of units benefit from an entire supply chain with aligned interests, which naturally forms collective defense. Once a scarce brand is caught in a PR controversy, this immune mechanism simply doesn't exist. The brand must face public opinion alone, and typically lacks appropriate crisis communication models to respond.