I believe you when you say you're disgusted. But don't pretend it's just in the context of realistic conformity to the practical needs of the plot. After all, it's just a short make-believe story that isn't even about the quest you put so much focus on. You make it quite clear that what you find disgusting is the idea of people who are overweight according to modern standards. You're lying about your perspective at the beginning of your second paragraph. I don't know if you care whether people notice, but I thought maybe you would be interested in knowing how obvious you're making it. If you really want to hide your true opinion, you should be more subtle.