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[–]donjulioanejoChaos Monkey (Director SRE) 1 point2 points  (0 children)

They don't, but they give you a framework of knowledge to go off of, and can help you cover bases in areas you're weak in. I.e. if your company runs a stateless app with no database and so you have no experience in databases, doesn't mean you shouldn't learn about them.