Why does the cone give several days of hair (between washing)? Is it better hold or better at retaining moisture?

I don't see much of a difference using cones or not so I am curious as to the specific benefits other curliest see?
High Density, High Porosity, Medium Texture, 3B with some kink

DT: SS DDMT - HG
Lo-Poo: No Preference
Co-wash: CJ Smoothing Conditioner
RO: CJ Strengthening Conditioner - HG
LI: CK Satin Roots
Styler: CK Coil Jam
Other Likes: Castor Oil; CK Twist Whip, MD CSC
Dislikes: Wheat Protein; Aloe LIs or Stylers