Because the source isn’t a recipe in this analogy it would be akin to buying a cake mix and following the cooking instructions.
A further development of the analogy would be one could try to replicate the cake mix by reading the list of ingredients and using their knowledge of baking and trial an error to replicate it as closely as possible vs getting their hands on the exact formula used by the maker of the cake mix.
A further development of the analogy would be one could try to replicate the cake mix by reading the list of ingredients and using their knowledge of baking and trial an error to replicate it as closely as possible vs getting their hands on the exact formula used by the maker of the cake mix.