The same can be said about unions and market power. Sure deadweight loss exists. Someone will absorb the cost, but it’s not necessarily “the people”.
Companies cannot pass costs onto consumers as easily as economists claim, so often profits take the brunt of the deadweight loss. Think of it this way: if companies could just pass on the cost, why go through the expense of fighting the union when they could do just that?
Mind you, I’m talking about unions in general: it’s nuanced. I honestly don’t know enough about the specific demands here to have an opinion, but I encourage everyone to listen to an interview with the longshoremen.