Redundancy should only be necessary when and where it makes sense. I don't think this is one of those cases.
Though I am a bit surprised that it would take a week to get and install replacement parts...
From someone posting the link below and reading TFA, there has been no indications to what the actual problem was.
But given that it effected the whole building in order to enact a repair it might have taken a bunch of upstream switching of large capacity power systems. Co-ordinating, doing arc-flash assessment, safety plans, organizing labor and proper tools etc could easily take a couple of days in itself. Let alone performing the work, doing proper testing and then reversing all of the up stream switching.
Performing work in large scale systems does get paperwork intensive. However that has come about as a means to combat workplace injury and/or death. So I'd rather do the paperwork.