What do we do for a living?

As marketers what do we for a living? It’s not just creating an environment conducive for a sale. It's not just to move products. I would like to argue that what we do is try to initiate a change. A change that is hopefully for the better. A change that will benefit the people at stake. And it boils down to these things: It is either we want to start a new habit (or belief), or we break an existing habit (or belief). Or a combination of both. Creating a habit of using your app that will encourage people to exercise. Breaking a habit of alcoholism with a program for your nonprofit organization. As you start making your marketing plan think of these things. What are the habits I want create or break? And what are the steps I need to do to initiate it?