Ever seen someone doing their “unskilled job” all their life? It’s just fucking magic!
The truth is that capitalists hate skilled workers, because those workers have bargaining power. This is why they love the sort of automation which completely removes workers or thought from the equation, even if the ultimate solution is multiple times more expensive or less competent than before.
Nothing is more infuriating to a boss, than a worker that can talk back with experience.
Retail workers have to deal with irate customers, develop product knowledge, and how to sell items. Fast food workers need to learn how to work as a team, make the food at a consist quality, and juggle multiple orders at once.
As for farm workers, if they are working with animals: how to read the animals for their behavior, treat minor injuries of animals, and how to manage animals.
I will agree that all labor deserve a living wage.