Damn, it's almost like workers rights and safety are aligned in some way...
The law can give a bit of leverage to people who otherwise have none, but I’d wager there are more people who have leverage of their own than whose employers are only restrained from abusing them by law/contract. Especially in a tight labor market like today’s (outside tech).
One side wants something. However, they have no leverage. Accordingly, they make a claim and see if the public will back it up. If so, you now have a token to trade at the bargaining table that you never actually intended to play. If the public isn’t on your side, you just say you’ve learned from the public’s opinion.
We see this garbage with the NFL all the time. Most recently, it was with the manufactured penalties from touchdown celebrations.