Why is Dravid eating so many balls? Is he so hungry ?

I feel a Test Cricket opener should use or face as many balls as possible. This will make the ball used and it will ease the other batsmen who can play later to play better.
Why are we not understanding this but blaming Dravid for eating up so many balls and scoring few runs.
In the first test match of India Vs Australia, Dravid used 66+114 =180 and scored only 5+16 = 21 runs and there were many talks on changing Dravid from opening to down the order.
I agree that batsmen needs to keep the score board running or atleast walking ;) (second test Dravid scored 1 run after 40 balls - in the middle of his innings) but there is other side of the coin that we were not realizing.
Is he not making the ball lose its shine and become an old ball. Wont it not be easier now for other batsmen to play better. Why are the other batsmen unable to continue the game better ??Looks like Million $ ?s ?? ;)