Unions sound good to the non-deep thinker ("let's all join together, the man can't screw all of us!") and at one time they were probably needed when industry growth outpaced safety and large firms abused their asymmetrical power. Like 100 years ago or more. Before labor laws.
But given the laws on the books now regarding standard work weeks, worker safety, non-discrimination etc the unions are down to bartering for the right to guaranteed, predictable pay and benefits based solely on seniority. Some rational thought will instantly reveal that unions are set up to protect and, indeed, advance the worst workers while supressing and limiting the best. Mediocrity codified and celebrated.
One of my kids works in a non-union hospital. She enjoys it because they are very flexible with her schedule, which has allowed her to pursue further education.
The Purple People Beaters are putting on a full-court press to organize the place. I told her the very LAST thing she wants is a union, because the day that happens the only factor that can be taken into account for scheduling is seniority. Her days of going to class on the side will be over.