Usually, the patient knows the most about their health history. The meaning of test results should be explained by the patient's health care provider until the patient understands. It is likely that anyone interested enough to request a copy of their medical records is also interested enough to Google for more information. In the worst case, the patient is as uninformed with the records as without. Out in the real world, it is not uncommon for a doctor to only make a cursory review of a patient's chart before entering the exam room and for the patient to have to verbally provide basic and important information about their health history.

Providing information is what doctor's do. Good doctor's focus on the patient making an informed decision. Witholding information is contrary to that good practice.