Precision vs Recall - different information needs - different searching techniques.
retrieving what you need
retrieving all you need
Precision and recall are inversely proportional
A high precision search ...
A high recall search ...
When confronted with an information question, you need to decide how to balance the need for precision with the need for an appropriate level of recall. The higher the recall needed, the more you need to employ good literature review skills.
Knowing how to do a thorough literature review is not just "school work". Whether you go into academics or work as a professional scientist or engineer, being able to find the necessary information efficiently is a highly desired skill and one that employers expect you to bring with you from college.
Consider this excerpt from Head, Alison J. Learning Curve: How College Graduates Solve Information Problems Once They Join the Workplace. Project Information Literacy Research Report, the Passage Studies. October 16, 2012. p.24
"The employers ... said they expected young hires to be patient but persistent researchers.
Specifically, employers said they needed them to be capable of engaging co-workers in an interative research process, retrieving information in a variety of formats, identifying patterns in an array of sources, and diving into sources of information.
Yet these information competencies were rarely demonstrated ... [young hires] had a tendency to respond too quickly with answers conventiently plucked from the nearest source. At worst, [young hires] solved information problems with a lightning quick Google search, a scan of the first couple of pages of results, and a linear answer finding approach."
Those desired information skills mentioned by employers are the same ones used in high recall searching to ensure the necessary thoroughness: interative research process, variety of formats, array of sources, etc.