These people do not care what grief, loss, and chaos they wreak upon families and lives so long as their pillows get the proper number of feathers.
Especially today — in days of yesteryear employer corruption was a genuine problem and things could get life threatening in either direction, but that is not accepted in the USA under modern standards, unions or no. Unions have virtually worn out their useful existence in the USA. 85% of American workers aren’t union.
What goes around comes around, to some measure on earth as well as perfectly in heaven.
My uncle has a basic HS education and no real marketable skills. He's a custodian who belongs to a Union. For him, and people like him, I can see why they join.
I also worked for a company where the hourly people were all unionized. I don't know all of the details (wasn't a member) but my understanding was that they had no real negotiating power with the company - they were "collectivized" more for benefits than anything else. In general, the arrangement worked to both the company's favor AND the union's.
So - there are places where unions make some sense, or at least I can see why people belong to them.
In general, though, they're useless remnants of a system designed to resolve issues that disappeared decades ago.