Anna Heringer herself has been advocating for the use of mud because there is no industry lobbying, influencing, or pushing for its use despite all its advantages.
It requires no firing or cooking in order to acquire its final building properties, so almost no energy is needed in transforming matter into material. It is always close to construction sites so it also has a very low carbon footprint in terms of transportation. It provides thermal mass. It can easily be maintained and repaired.
But building codes worldwide tend to ban its use. Legislation has not taken into account that new knowledge has been developed and new technologies can be applied in order to guarantee its safe use. Anna Heringer is trying to use a built project as proof of this so that legislation can be brought up to date.
Anna Heringer also understands that the advantages of the material are not just technical or environmental, but also cultural and social. Its local availability means that people tend to see it as a familiar material, not alien at all. She has therefore developed an architecture as a process of inclusive nature; construction is not just a procedure to build buildings but a means through which to build community.