Who says that the obese are no less driven than an anorexic?
I would assume that the same disorder that requires/allows you to absolutely destroy yourself would be applicable to a morbidly obese person too.
I don't think that your avaerage person is capable of the dedication that it would take to be corpulent to the same reverse degree.
Any excessiveness is frowned upon by society for good reason, whether it is anorexia, obesity, workaholism, greed, etc, etc.
Different sides of the same coin.
This person who had a high GPA across the board, is there any moderation in this persons life or did they devote everything they had to atttaining those marks?
Sure good marks would indicate a successful future, but against what measure? High paying job but no life outside that job (i.e die alone but rich).
Moderation is the key, but it is so easy to lose sight of.