I will try to answer this question as a current student.
One reason might be that employers don't require and don't really differentiate students of all top MBA programs basing on their hard skills.
All MBA graduates of top schools are taught common skills and course set and employers reasonably conclude that both HBS and Fuqua students know enough about finance/marketing/stategy/etc.
The factors that differentiate students are: soft skills, ability to work well in teams, team leadership skills - all the things in which Fuquans are little bit stronger, when compared to others. And employers value these skills more that your undergrad GPA, that you got 5 years ago.
Because MBA-type jobs in corporations require a lot of communication and team collaboration, and very few focus on your undergrad GPA as a diff. factor. This might give you an idea why Fuqua focuses on "fit factor" that much.
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