These sort of vulnerabilities are inevitable with tight supplies at peak, and are a product of it.
In the past, a disruption in one place would be countered by production increases in another, often almost seamlessly.
A stretched fabric tears more easily.

A stretched fabric tears more easily. -DaveMart

Excellent.

As a corollary, there is no particular need to trace the precise origin or history of a given tear once we understand that the whole suit of clothes is coming apart.

I've described the US economy as a guy with terminal cancer and a bad heart condition, who is shot while being run down by an 18 wheeler. What killed him first? Does it matter?