My first job was as a Swiss army dishrag about 20ish years ago. It was unionized back then. I had no idea what it ment but given I was making a "student minimum" and they where taking a sizable cut of that, I had to quit as even an 8 hour shift was making me less then cost of getting to work.
I wasn't given any unions handbooks, and never spoke with any rep. I just assumed it was another tax everyone had to pay.
Though I certainly understand that value of those union dues now and I was happy to pay them in of my more recent better paying jobs. At a academic role I had a hour long meeting with my union day 1. I was given a bunch of resources and contacts.
Unions are great but they are not equal. So hopefully these workers get a better one then I had when I was in Swiss chalet