If you are only doing what you are getting paid for, and doing it no better than the average employee, then your pay is most likely right where it should be.
Most of us are consumed with our own thoughts and desires and are not always thinking about what other people may want. This is not necessarily being egocentric; it is just being human.
Not being in tune with your customers is like living in an alternate reality; the way you think your customers feel about your product is not always the same as what your customers really think about your product.
One's work usually occupies more than half of one's waking life. Choosing work that does not bring happiness will lead to a life that is mostly disappointing.