Here is the real story.
Years ago airlines would employ all kinds of workers on full benefits.
These people would stay for decades in their positions, such as ramp agents, and
mechanics, and thus they would gain decades of experience enjoying a decent middle-class standard of living. Things did happen but these kind of preventable delays due to ground damage were rare.
Now all these jobs are farmed out to subcontractors who pay peanuts, and have high turnover. This is the cost of outsourcing.