If you're implying credit checks don't hurt workers, you can GFY. Medical bankruptcy is real in the US and being unable to obtain employment because you were sick and couldn't afford a $300,000 bill is asinine.
Considering the work pattern of last mile delivery drivers compared to OTR truckers and how rarely both groups fall asleep at the wheel and crash into things this doesn't bother me in the slightest. Being subject to all the regulatory overhead that goes with a CDL would be bad for, the workers, the employers and anyone buying their services. It's not like UPS drivers are falling asleep at the wheel and running over little old ladies left and right. There's no negative externality that can be eliminated by regulating delivery drivers.
"Now they exist almost solely to return as much financial value as possible (wages) for the investment (dues)."
And the company doesn't exist for the same thing?
The union also fights against CDL requirements for better/safer drivers and allows excessive overtime because it pays out so much.
Its not a good union by certain measures, like a lot of big unions focused on low/no skill labor it can help raise salaries (and raise product cost) but also not be helpful in anything they think 'hurts' workers like mandatory unpaid breaks, CDL requirements, background/credit checks, etc.
Modern unions have little in common with the unions of old that existed before we had any real safety regulations and far less labor regulation. Now they exist almost solely to return as much financial value as possible (wages) for the investment (dues).