It's not just life and limb. Protecting property is also considered "essential". So critical tests to prevent the loss of a billion dollar satellite that couldn't not be performed at any other time should have been essential enough to bring in the government employees needed. I like to blame the Republicans as much as anybody, but if the summary is true then it's the NASA manager who didn't call his people back and jeopardized the telescope work who done F'd up this one.
That the potential loss in property was a future-cost is not relevant, the early Oct. time-frame was the only time the schedule would allow the tests, even if the failures wouldn't be noticed till after a (explosive?) launch. The THREAT to property was immediate if not the consequence.
It's a naive, domestic operating system without any breeding, but I think you'll be amused by its presumption.