AWS has a history of making hand wavy explanations on the robustness of its infrastructure that were misleading at best. See comments about how regions are truly independent only for everyone to find out if us-east-1 goes down you could still be down even if you built in other regions. Those dependencies were not well documented and previously hand-waved away by AWS when it boasted about how its regions were truly independent.

Similar here, there’s a lot of detail that got hand-waved away by a sloppy “yeah we good” puff PR answer.