Earlier quoted context omitted.
They're upvoted because people can't resist making the same tired "see? we are over-reliant on {Slack,Github,Cloudflare,etc}!" comments.
My favorite are the conspiracy theories as to why the outages are seemingly so close together in this Summer of 2019. All kinds of imaginative reasons abound. My best guess is summer vacation :) it's at least true for my company who was one of the featured outages
TL;dr- complex systems are complex, and trying to understand them isn't usually possible for outside parties.