I don't mean nothing good can ever come from a failure. I certainly don't mean all failures are the same. I'm just pointing out that the word "fail" means something, and it's not a positive thing. Redefining failure as something good, no matter how well intentioned, inevitably means we end up talking about something else.
Now, there is real value in recasting a particular situation as something other than a failure. Call it a learning experience, an investment, an education - great! And there's much wisdom in finding goodness in a failure experience. But let's not treat failure itself as something greatly to be desired.
Nobody wants to fail. We want to succeed. Unfortunately, a certain amount of failure is inevitable. But the $1M question is "How much failure is enough?"
NASA's Faster Better Cheaper initiative had a 90% success rate for its first 7 years. Then in 1999, it had a 20% success rate, for a grand total of 62%. For unmanned space missions, the sweet spot is probably somewhere between 90 and 20% (preferably closer to 90, right?). But where? I don't have an answer on that. All I know is that if you can't tolerate failure, then you absolutely deserve every mediocre ounce of "success" you achieve.