housewife housewife:
They keep saying that they have safe guards but we saw no evidence of them
What we saw was evidence against them. I have designed enough networks and data centres to know that if they failed, then there is a single point of failure somewhere and whatever redundancies they thought they had, this fail showed them ineffective.
You don't ever patch all your systems at the same time, you patch one of the branches, and if it fails you roll back, leaving your other pathways free from disruption. If it was a beaver chewing cables, or someone digging before they called, or some cleaning lady polishing the big red button with (!) above it; then there is a single point of failure and your network is not redundant.
/rant