Given a long enough timeline, the probability of your software systems having a significant outage approaches 100%.
This is a fact, and your acceptance of it is reflected in your operational culture.
Avoiding outages is the primary operational goal for many organizations, and for good reason – but it shouldn’t be your only goal. A singular focus on uptime will lead you down a dark and murky path, bereft of inspiration. This path is also littered with piles of wasted money, and is haunted by the shadows of engineers who have left your company after your culture bored or exhausted them.