Leonardo da Vinci

Though builders may build, in the main they follow the plans of architects. Teachers teach, but they must have a text. Politicians govern, but only upon the flow of commentary that raises them up or casts them down.

The original entrepreneur may initiate the initial purpose, but, in a sense, like a parent that has children, the children have their own destiny, and at some point, that can veer off away from the wishes the parent might have for it.