The information has stood a test of truth by an editor or editorial board, and the publisher endorses the validity and reliability. Another consideration of the value of formal information is its cost. Expert, professional, external information costs money. Whether or not it is worthwhile is a judgment call by the individual. Some professional services are free to individuals although the service is supported by institutions.
County agents provide free consultation to farmers.
Priests and pastors do not charge individuals for their counsel as do public employees. Teachers in public employ never bill their students and are forbidden by their code of ethics to accept payment from their students.