You are talking about apples and oranges.
Why would a person's physical appearance negate their ability to give sage career advice?
They obviously are following their own passions: Leisure and good food/drink. Nothing wrong with that.
That's like saying Steven Hawking must be a terrible scientist because he obviously cannot conduct experiments himself nor travel to the far reaches of the universe that he so well understands.
Or that someone paralyzed in a wheelchair could not possibly be an athlete themselves or could not possibly instruct or coach a student in how to be a great athlete.
So you really DO have something against obese people to draw those strange conclusion, methinks.
Jennifer