The religions may be wrong but they serve a different purpose than science. They solve problems concerning peace and happiness. Even if the cure is placebo it works.
See some research how religion affects life for example:
Specifically, religiousness in U.S. youth has been associated with academic success (Elder & Conger, 2000;Regnerus, 2000;Smith & Denton, 2005), prosocial behavior and volunteerism (Donahue & Benson, 1995), and in some populations, enhanced self-esteem (Elder & Conger, 2000). Religiousness has also been associated with reduced externalizing and delinquent behavior (Benda & Corwyn, 1997;Blakeney & Blakeney, 2006;Elder & Conger, 2000;Elifson, Peterson, & Hadaway, 1983) and internalizing behavior (Smith & Denton, 2005).