I used to live not far from a regional logistic hub for Fred Meyers, and sometimes for extra coin I would help a friend of mine lump trucks there. Some drivers most certainly do unload their own trucks. That way they can keep the lumper fee that they were allotted. The fact that this is done primarily for refer trucks hauling fresh food makes the whole cough, cough argument quite valid, IMO.
Even if the drivers that choose to use third party lumpers, or if the warehouse staff does the unloading, they still interact directly with the people doing the work. There is no hermetically sealed bubble that the wheel monkeys just sit in while someone else does the work, and to suggest so is just not true.
Y'all are big boys, and you are entitled to your opinions. I'm not going to argue with you about it, but I'm not going to agree with you either. IMHO, the 'freedom rally' is all about a bunch of whiney truckers that need a time out. I support truckers on the whole, but I do not support them shutting down Ottawa, or any place else over their refusal to be vaccinated.
If you want to work in the public sector, especially if your handling my food at any point, then you should have taken at least a double tap to the shoulder, cut and dry.