Why is spinner etc used to make nylon but is not needed to make cotton or wool?

Spinnerets are used in the production of nylon because nylon is a synthetic polymer that requires extrusion through spinnerets to form continuous filaments. In contrast, cotton and wool are natural fibers that can be directly harvested from plants and animals, respectively, without the need for such processing. The spinning process for cotton and wool involves carding and twisting the fibers rather than extruding them through a spinneret. Thus, the methods for producing these materials differ significantly due to their distinct origins and properties.