I've been in unions. I know the mindset. I know the attitudes of the reps. I also know that unions are political animals which exist for the purpose of self preservation and the accumulation of power and influence for themselves. Any pretense that unions exist "for the workers" is about as believeable as Hildebeast doing anything "for the children" and not for herself.
I wonder, why would a worker do anything unsafe and illegal for years, only to become "safe and legal" when time comes for negotiations? You and I both know the answer to that. It is a dance. A dance that the unions prefer to call the tune for.
It was in response to the PMA (the company representing the (mostly) foreign shipping companies) threatening to bring government intervention into a collective bargaining process, the American collective bargaining process. The workers just decided to follow the speed limits, which they should do anyway but don't because they just want to get the job done and go home.