That's what he said, but I always thought he should it occasionally, like for festivals and such. 

Undisciplined

Amazing! My dad is a professional cook and I can tell you that not every work is done as work. Some work is done for fun, interest or as hobbies. 

It may be that your dad wanted his hobby of cooking to remain just a hobby. 

IamSINGLE

Homemade Hummus

I really do think more people should try out marketing their crafts. My dad was a very good cook, and often cooked for large numbers of people, but he never wanted to try out doing it professionally.