how important is calorie counting?

I used that calorie counting method that abear has a post in the weight lifting section. Specific Diet Program

So I did the calculations and it says I'm supposed to eat 3000 calories a day. Thing is, I barely hit 2/3 of that amount, yet I get over 1 g of protein per body weight and enough carbs and fat. Moreover, I am not little and skinny. I have gone up in size and tightened my stomach.

So my question is, does it really matter that I dont have enough calories in my system? is calorie counting bulls.h.i.t?
 
if you're making progress, thats all that really matters. i like to know how much of what i'm eating. that way i can see what does what. :)
 
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