Observations (which may or may not be relevant in your case):
Some doctors feel too superior to their patients to listen.
Some doctors, regardless how they feel about their patients, have too many other patients and duties to offer much in the way of truly listening.
Some doctors - fearing what the patient may tell them might obligate actions, referrals and all the necessary paperwork - don't want to hear.
Some doctors listen or at least try to listen. The bureaucratic frameworks in which they are enmeshed may or may not permit them to do anything to act on what they hear.