Because, its JKD.

And your point is? If you only do it because it's JKD then you are not following the philosophy of JKD, that is, oyu are only following tradition.
Member of DaJoGen MMA school under Dave Hagen and Team Chaos fight team under Denver Mangiyatan and Chris Toquero, ran out of Zanshin Martial Arts in Salem Oregon: http://www.zanshinarts.org/Home.aspx,