Life is too short to build something nobody wants
When thinking of User Experience, we often think of a simple, beautiful, and easy to use feature-set of a product, that makes the user's life easier. But as a matter of fact, features are merely a small, fragile part of the product. They are only a few of many thinkable solutions for a user's problem the product tries to solve. Thinking in products means thinking in specific user's problems, in jobs to be done, in goals, and in revenues.