And look, it's the same union!
I think a key part of this issue is the business is having no problem finding non-union workers who are assets to the company.
A core tenant of the unions is they provide a pool of workers who have the essential skills the business cannot survive without. This strike makes it clear that this is not true.
It's been false for decades.
At one time unions did consist of skilled tradesmen who were highly skilled and specialized. Now unions represent the unskilled laborers and demand they be paid in excess of their value to the business.