What is often a drawback of relying on expert opinions in research?

Relying on expert opinions in research can often lead to selection bias. This occurs when the experts chosen to provide their opinions may not represent the full spectrum of views or knowledge on a topic. Their perspectives can be influenced by personal beliefs, experiences, or affiliations, which may skew the findings or conclusions drawn from their input. In research, it's crucial to gather diverse viewpoints to ensure a balanced understanding of the subject matter, and relying heavily on any select group of experts can hinder this. This limitation highlights the importance of incorporating a wide range of data sources and perspectives to arrive at well-rounded conclusions.