Wrist Grab Defence – Why bother?

Hi all

On one of my videos someone posted this comment,

“Can anyone post applications where it is not someone grabbing the wrist..this is a very clear and well executed video… I have never known someone to grab the wrist …but as I say excellent and clear thanks you”

I made a shot clip explaining my position on this subject, do you agree with me or in fact there is no point teaching defence agaist wrist grabs?