You always learn from all types of experience. Of course you won't just learn how to do something by doing it wrong many times, but the reason for the "cultural fascination with failure" is that if you don't try you don't succeed, and if you do try but fail, should we say "well, you did it wrong?". No, learning from failure is an optimistic way to see failure, and it's perfectly fine.
The post is a bit ridiculous.