Baby weight

I just read that Jessica Alba shed her "baby" weight in just a few weeks. Well, bully for her. I suppose being young, rich and slender before she got pregnant may have given her a slight edge. My kids are in their 30s and I still have "baby" weight to shed! Seriously. Alba ate 1700 calories a day. I'm so sure she shopped and prepared the meals. And she had a trainer come to her house six days a week. Just like the rest of us. And the promise of a multi million dollar movie contract might actually motivate me to lose the baby weight!
Why do we compare ourselves--our lives and our bodies---to those who are genetically, economically and socially privileged? Why?