https://www.youtube.com/watch?v=THNPmhBl-8I
My favourite of those.
Fun note: a very long time ago I dated a woman who happened to be a brain surgeon. She used to joke her work was actually easy because nobody realy expecting her patients to survive.
It's a potential indicator of either the difficulty of the task, the abilities of the people performing the task, or both[1]. It's also an indicator that no matter how many things were done right, one or more things were done wrong.
I feel that your original post and subsequent reply reflect the pervasive perception that failure is a requirement for doing something big successfully. I think that's a misconception that's running rampant in the startup community. Failure can happen and it can be learned from, but success is possible without it.
1. In this case I'm going with 'difficult' and 'some things not done right'. Strongly suspect incompetence was not a factor :)
How is this different to you than launching rockets?
It's different to me because launching rockets is much more difficult. There are many more things that can cause you to fail catastrophically.
To me, failure is to be expected when you're doing something that is difficult. That is the definition of doing something difficult.