The problem is that the vendor is incentivized to publicly use whatever metric shows the highest availability. Otherwise, the vendor will have to pay back credits. The vendor's nines are never my nines.
Do you trust AWS' status page? Or are you coming to Hacker News to ask why your network latency between instances has skyrocketed unexpectedly?
As an aside, once in a while I imagine what kind of field day Upton Sinclair would have with this trip around of the pendulum swing toward dystopia.
Ineptitude, and it being a hard problem, are sufficient to explain the status quo.