Why might a person go to a specialist instead of a family doctor

Because the specialist will treat a specific problem in a more complete, less generalized, specific and aggressive way.

Explanation:

Capable of caring for patients from birth, family doctors can deal with up to 80% of health problems. The central idea of this specialty is to know and accompany the patient for life, which resembles the figure of the trusted doctor. The doctor who does residency in family medicine can accompany, for example, children, perform gynecological and urological preventions and, if necessary, refer the patient to a specialist.

However, a family doctor is a general practitioner who often does not have the knowledge and practice to treat a specific and more dangerous problem. In such cases, it is common for people to seek medical attention from a specialist. Because the specialist will treat a specific problem in a more complete, less generalized, specific and aggressive way.