afaik, it would create hierachies based on inherited wealth, as well as leaving the patriarchy in place, race hierarchies etc. Their definition of anarchism is the abolishment of gov and nothing else.

See the SEP’s reply to the objection that “anarchy will always evolve back into the state”.

anarchists might argue … that rational agents would choose to remain in anarchy rather than allow the state to evolve. Some anarchists may argue that each time a state emerges, it would have to be destroyed. But others will argue that education and human development (including technological development) would prevent the reemergence of the state.

This argument can probably be applied to capitalism as well.