Textile physics is an essential subject for textile engineers as it studies the structure, mechanical properties, and physical properties of fibers, yarns, and fabrics. It enables experts to understand properties like tensile strength, moisture absorption, heat transfer, optics, electricity, physical structure, and yarn geometry. These concepts are fundamental to understanding how textiles behave and setting manufacturing parameters. The document argues that textile physics provides crucial basic knowledge for a career in textile engineering and is highly relevant to the field.