The answer is the same as the people who gave oysters or crabs a try... when you're starving you'll try literally anything. When it doesn't turn out to be toxic

The answer is the same as the people who gave oysters or crabs a try... when you're starving you'll try literally anything. When it doesn't turn out to be toxic, or make you feel ill, that's something you stick with. Something like cheese is even better, since you can turn a wasted surplus into portable, stored calories.