I hear that you're suggesting that those involved shouldnt feel bad because its a systemic / just a job / etc. But the reality is that incidents like this can be very traumatic for those involved and thats not something they can control. If it was that simple to manage, depression and anxiety would not be a thing.
Think its best to show a large amount of support and empathy for the individuals having a really bad day today, and how awful they may feel. Some will probably end up reading this thread (I know I would).
And of course, still hold Fastly the business accountable for their response (but objectively, once we understand what the root cause was, and the long term solution).