Some missing the point here.
As Rusty nails states most people wear clothes most of there lives (unless there nudists
).
Coming from a Judo / Muay Thai training regime getting a fast, strong grip on collars, sleeves or lapels adds immense torque to the stand up grapple, throwing, subs and chokes.
Working on recovering from missed punches to grabbing collars, mullets or any other handy grip and transitioning into strong throws gets everyone interested as they can see the practicalities.