Its only "being fair" if those are significant factors in an adult woman not knowing how to eat to avoid extreme morbid obesity.

This isn't a moderately chunky person who is keeping weight on due to minor details that might need to be taught. Its a giant balloon who can only maintain that size with consistent and heavy effort, short of a highly unlikely medical disorder.

There is no fairness to give, its just making excuses. You can literally do almost none of what you said and not end up anywhere near that size.