[munchbunny]

I'd agree if that were actually true, but it's not.

With large enough services there is always some acceptable level of errors due to 0.001% probability events. When there's an outage, it's not usually everything down, but even 0.1% of jobs failing ends up affecting a lot of users.

Even 10% of jobs failing still isn't "down", it's "partly down", even if you have to issue credits for SLA violations and publish a public postmortem later.