Its more important for you to move fast and break things and make us money than to move slow and do things the right way. The life of an engineer...Do it now! why did you do it that way!? Now we are screwed??
Facebook’s php developers like to move fast and break things. Bad design choices, monkey patching, breaking things on production, it’s all part of Facebook’s “engineering” principles.
If they'd done a proper post mortem and corrected the fundamental issue, and made sure it wouldn't have re-occured, this should not have happened.