This is unrealistic and seems to be biased by some kind of broad un-focused hostility. Yes, maybe they were overstaffed. But it's reasonable to suspect that leadership overcut, given the current climate and the number being 15,000. Your characterization of Twitter predictions relies on cherry-picking and ignores the actual impacts, and there's no evidence that the system goes down without "constant" intervention from "thousands". Your tone also implies that large, complex systems, even if designed well, don't normally require a lot of maintenance from many people.