Not outsourced, specialized. A certified plumber is going to be able to build/fix plumbing more efficiently and with higher quality than someone who doesn't do it every day. The same way farmers grow food, mechanics fix cars, custodians clean buildings, etc. It is this utilization of specialized labor that has allowed society to produce large surpluses of high value goods and services available to everyone and allow for the pursuit of less absolutely crucial to survival tasks like art, science, and culture. People can then dedicate their lives to, say, the study of interpretive dance because the basics of food clothing and shelter were taken care of by the specialists.
The disconnect here is one common to commies, the Labor Value Theory, where the labor exerted is what gives things value. That isn't the case. It is the demand that gives it value. But they don't want to recognize that. Admitting that one form of labor (one in demand) is more valuable than another would be kicking down one of the pillars of their dumb ideology. This has led these speds to think that every unskilled dipshit's labor is as productive and valuable as the most skilled high-demand tradesman. This has led to the conclusion that only teeny-tiny amounts of labor are required for society to function but the surplus value of the unskilled is being exploited by the capitalists requiring them to work far more than is necessary.
It's the only way for them to explain how their useless asses make less than somebody else. It is the system's fault for stealing the excess value! That's why nobody wants to hire them or pay them very much. It's not that labor sucks. No no. The LVT says it is worth millions! Marx said it so it must be true.