You seem to be misunderstanding. A person who cannot read and write in any language cannot, by definition, write source code. However, that same person can st

You seem to be misunderstanding. A person who cannot read and write in any language cannot, by definition, write source code. However, that same person can still receive a verbal command telling them to pull a potato out of the ground. Or move a box from one place to another. This statement has nothing to do with the detrimental aspects of manual labor. Sitting at a desk as a programmer also has detrimental aspects.