Probably also using computers. And I've heard that CEO drink water too.
You know that the ones who started anti-AI movement were capitalists, don't you? Poor capitalists but capitalists that want to live without working out of the profits given by their Intelectual Private Property.
Primitivism are actually working against the interest of the working class. Without technology the workers are the ones who will need to work for more hours to obtain the same level of life quality.
Any proper worker cannot wait for having to do less tedious work, and mess workhours in general thanks to the improvements in technology.