Firstly, calm down. I gave you a small peek into my world and you're drawing a lot of bad assumptions from it.

We mitigate hardware issues with either hot spares or clustering. We have three datacentres distributed geographically with entire redundant sets of equipment (4x 42U racks in each).

With respect to software failures, we test everything thoroughly including failover conditions etc. Everything is load tested as well.

We are prepared for emergency. We have dedicated people ready to jump on that.

However preventing these things ever being needed is a professional responsibility which is my point.