I fully understand the need of all perfumers for a sustainable musk scent substitute, but the point maybe is rather about the use of an animal note in our botanical scents, such as Ambergris, Civet, Hyraceum or Castoreum, in order to obtain a perfume with a third dimension.
Like the small machines resembling binoculars through which you look in order to watch 3 dimensional photographs, there are only 2 images in the machine but the vision is truly tri-dimensional.
All these animal aromatic substances are pheromone molecules and they appeal to our nervous system and to our emotions as no vegetable really does. They do not need to be perceptible in a perfume, it is enough for them to be there. I remember a customer who recognized any tiny amount of rose present in any of my compositions because he hated rose due to some old traumatic memory. In the same way I observed that people recognize straight away in my compositions the ingredients that they particularly like or dislike even if I myself do not even smell it due to the tiny concentration of it.