Moving to another state for work is easier said than done. People built their lives at these places and moving to another part of the country is hard as it is, but the bigger threat that is in the minds of these workers is the fact that there is no guarantee that they won’t do this again, lay people of and offer another location. Imagine the fact that someone sells his house moves his family, gets his kids into a new school, and GM sais in a year or two that these locations will be hit bay layoffs.
https://www.freep.com/story/money/cars/general-motors/2019/03/03/general-motors-plant-closures/3051373002/