[taytus]

>they don't know why they failed, and that's why they failed.

You can very well know why you failed. Post-mortems (most of the times) try to answer that question

Knowing something doesn't make it inevitable.

[tonyedgecombe]

I've worked in a failing company where everybody knew what was wrong but still couldn't stop it.

Interestingly after the failure most of those people got new jobs doing what they should have been doing at the original workplace.