Do you think the term "average weight gain" is adequate for describing where indivdual pregnancies really are?

Everyone is so different and I think the "average weight gain" crap is all a bunch of crap. Every woman handles pregnancy differently and to put women into a small box of what's acceptable is ridiculous. Now I was about 25 lbs "over weight" according to the BMI (body mass index) pre-pregnancy, although I think that the BMI is a bunch of crap as well because according to that I should be 130lbs "normally" for my height and if I was 130 lbs I would look sickly like I was dying. So according to the fact that I was "over weight" to begin with I should've only gained 15lbs during my pregnancy. Things were going well in the beginning, I hadn't gained any weight, in fact I had lost 6 lbs. Then at 18/19 weeks that all changed. My belly popped out and I started gaining weight like crazy. Now at 36 weeks I've gained 45 lbs in less than 20 weeks even with eating right and exercising. But I've also had problems with weight my entire life, fluctuating back and forth since my teens. My doctor yelled at me for gaining so much weight but I've had no ill effects from gaining the weight, no problems with my blood sugar or blood pressure, it's just that my body took on a lot of weight. My boobs are huge and my butt, hips and thighs have all gained weight so most of the weight I've gained has actually gone everywhere else. My cousin is the same way, she eats right and goes to the gym and is still gaining weight fast, it runs in our family to gain a lot of weight with pregnancy. My friend on the other hand, had barely gained 15 lbs when she gave birth and she was TINY to begin with, according to the averages she should have gained at least 35 lbs and her son was born healthy So not everyone is the same and there's really no "average" it's all a bunch of bull in my opinion.