When things go south, we are well equipped with the reasons. The reasons tend to be everything else, but not us.
For instance:
Projects took a long time because of vendors, consultants, and technology, but never due to our lack of project management skills.
Similarly, change management is challenging because people don’t adapt, management and leaders are weak, but not because we fail to understand the people’s dynamics.
When we are screwed, it is always due to others. This is perhaps another reason we are screwed even more often.