I could eat a goose every day. To feed my family especially.
Natural moral laws only work in a cohesive society that developed them over a long period of time.
For example , I'm in China right now. The cities have almost no birds. Not a single pigeon. People ate all of them.
As soon as one appears. It's quickly eaten.
Near where I live in America is a bank intended for the poor. Set up by local Christians. It's usually loaded with wealthy Chinese and Indian immigrants looking to save a few pennies. People who make more money than the people who donated the food.
How do we solve that problem with morals?