Regarding the original question of the how and why.
Profit. Corporate, personal, and ego. Period.
Sometimes the profit is the driving force behind bad decisions. Many times the company is pushing the employee to make bad decisions (at the companies behest). Other times it is at the personal decisions of the personnel who feel pressure (ego) to fulfill expectations.
Sometimes it is corporate competition that drives faulty decision making.
The
PR market is VERY competitive and cut throat. Speed, Schedule and ETA are very compelling reasons to make bad decisions.