They generally aren't that monolithic.
You seem to be conflating shortage and scarcity, which generally aren't the same.
It's an interesting theory but I'd like to see some evidence.
For instance, the general consensus is the supply chain issue is from Lean manufacturing which, although has a lower overall cost, trades that off with a much lower tolerance for disruptions. It presumes availability and it turns out these supply lines were both much longer and more delicate then presumed.
You can see that in practice. Monolithic traditional manufacturing didn't have such issues. Things like paper products for instance. When the demand for toilet paper shot up in March 2020, the supply was able to meet it within days, compared to the years for electronics and automobiles.
These are pretty studied topics in the journals. You seem to be interested. They're pretty approachable. Go check them out.