I like this. This is the humanities equivalent of a refactoring. But there's a political edge to this that "refactoring" doesn't capture – these aren't just categorical boundaries, but they mark a distinction between high and low. Shattering them is a political act.
Sloterdijk is performing what we in the software trade call a refactoring, that is, a redrawing of the modular divisions of reality, finding new abstract commonalities between things previously thought to be disparate – and vice-versa. In the present case, the new major factor is called variously practice or training of all types – physical, intellectual, spiritual, all under the umbrella of the more general anthropotechnics, that is, the art and science of creating humans. Sloterdijk sees this kind of activity this as the origin and foundation of culture in general.