Why follow the traditional key bindings to move across (h,j,k,l)

[abhyuday-fr]

Traditionally we have k for up, h for left, j for down and l for right. I don't have any problem with the h,j,k,l themselves but rather.. why the left and right direction are so apart from themselves ( h and l). I think, it would be easier to navigate if left and right were together and up, down together (eg. h,j for left right and k,l for up down or something like this)