You don't want an airliner-pilot to seek failure. If banks make a big mistake and we slide into recession, people loose jobs, should we pat them on the shoulder for trying? What about the judge that sends an innocent man to prison? What about the solider that accidentally shoots an unarmed man? Can we assume he has learned from his mistake and will now be a better soldier? While this might be the case, the answer must be: No, we shouldn't.
Instead of postulating a culture of "fail often", we should find a higher standard. One that is based on hard work, sober and educated decision making and quality.
Furthermore it can be argued that one can learn more from success than from failure. Failure can be a byproduct of trying, but by no means it should be inverted into a measurement of success.
Let's stop this trend towards failure-ism now. I have a feeling that it might have very negative consequences.