Exactly. The only way this could happen in the first place was _because_ they failed at so many levels. And as a result, more layers of Swiss cheese will be added, and holes in existing ones will be patched. This process is the reason flying is so safe, and the reason why Cloudflare will be a little bit more resilient tomorrow than it was yesterday.
That's often the case with human error as especially aviation safety experts know: https://en.wikipedia.org/wiki/Swiss_cheese_model