You
a. can't compete for close rebound if you are behind a big guy
b. can't defend a big guy in close range if he gets the offensive rebound
c. are too far away from opponent trailing players if the ball gets kicked out
d. are too far away for a long rebound
e. are too close to the paint for any potential faskbreak with outlet pass from your own bigs
In short, you are doing every possible harm to your own team while bringing nothong positive, if you run into the paint after a shot is fired. UNLESS, there is no own player for weak side rebounding effort, then you just run to the weak side.
How hard is common sense?