No individual dockworker has "complete control", and the union only has the control its members collectively consent to.
Workers use leverage and they get condemned.
Companies and governments do it and they get praised for being paternal protectors.
If the suits who run the show don’t know how to unload a container ship that’s their problem.
Their country, threir rules or he can leave.
I am stronly pro unions as in Sweden, beacuse I worked there, and have seen it. They are not like the US unions. Around 70% of people in Sweden are members of unions for $15/month.
Sweden Tesla worker salary is 4k/month, with full health insurance, free kindergarten, free school, free college. In case they get ill, workers get 2 years of 80% salary, and rehabilitation.
While you have at will contrracts in the US, unions in Sweden have ensured 3 months notice. Unions also negotiate minumum annual raise and gives you annual raise at least equal to inflation.
Unemployment insurance is handled by unions, you must be a member - 1 year of 80% salary and additional year. If needed, new training is obtained for free.
Without a union agreement, Musk workers are slaves.
No serious brand operates without unions.
Should pilots have complete control over all planes in the air?
Also, business owners routinely pull the exact reverse, where they withhold or alter their services to extort other participants of the system to give them what they want. Why is it "good business" when the CEO does it but it's "crime" when the workers on the ground do it? Probably, cause it threatens many peoples fantasy that they can be powerful, rich, and in control of the labor one day if they play their cards right.