If an industry leader with "the brightest software engineers in the world" is unable to write their software to a higher than average standard, then I think I am in the very reasonable position to point it out and raise discussion about it. Don't place me in an ivory tower for that.
Why should we just sweep this under the rug and call it a day? There is something very important that can be learned from this. Apparently, FB themselves have not learned, because this is not the first time this has happened. Why was this allowed to happen more than once? Did Apple, Google, Spotify, Facebook etc not take any actions?
"Shit happens" is one way to look at it. Another way is to question whether we as software engineers are really doing our job properly.