Just in time manufacturing contributes a lot to this shortage. We rely so much on integrated supply chain logistics, the pandemic clearly brought in to focus the "optimizations" of JIT manufacturing. The lack of local supply pools as buffer is so short sighted.
Imagine a link-layer protocol without any buffers, no retransmissions or any kind of resilience, built on the most optimistic estimates; that’s essentially what the “business world” has built with their irrational philosophy based around “the market”..