> Not everything is a state secret.

No, but almost everything is a potential DDOS. And slight modifications to emails, documents, and calendars can cause a lot of havoc that may be hard to detect.

It's not about state secrets, it's about being able to provide services when the US is turning Hostile.

Hospitals or Police aren't guarding state secrets too, but if they would loose access to their IT Infrastructure because Donald had some strange brainfart this morning like the Judge of the International Court of Justice it would impact the State critically

There's no point in having a parallel software "infrastructure". In fact, it's a choice well known for never working.

Either your main architecture handles something or it doesn't get handled.