leaving a base early

[steveshane67]

thank you,

follow up question,

how is one supposed to discern the difference of not touching the base until the ball is batted and 8-7-V

V. When a runner is positioned behind and not in contact with a base to get a
running start on any fly ball.
EFFECT: The ball remains live.

SP game, lets say the runner, during the pitch, takes a step off 2B towards RF, the rule book really expects you to wait to see if 1) if the ball is hit high enough in the air to be considered a fly ball and 2) if the runner gets a running start.

seems like an awfully worded rule, and really completely unnecessary. and why would a runner want a running start on a FLY ball, wouldnt a GROUND ball more warrant a running start???