Secondary Research Is Better Than Primary?

Secondary research is often used before conducting primary research to assist and clarifies what to extract. It also means, building your hypothesis based on secondary research and proving it via primary research 

For example, someone performing competitor analysis, and is unfamiliar with competitors in a market, could access secondary sources to place a list of potential competitors 

Also, secondary research is better than primary one because secondary data collection is often used to help set the stage for primary research! 

And sometimes.... You may find the information that you are looking for via secondary sources and eliminating the need and expense (time and effort) to carry out your own primary research