It is you who is in fact confused about what hierarchies are because they have absolutely nothing to do with coercion, and have everything to do with division of labour and abstraction. You seem to have a personal definition of what a hierarchy is. Hierarchies do not require any violence whatsoever, and it's a concept that applies to large range of domains outside politics such as writing computer programs. Next, you'll be telling me that class hierarchies require threat of violence.