> To them, hearing that they need to read a chapter about the internals of a source control system before working on a project is like hearing they need to understand the details of how a transmission works before they go and drive an automatic

Shouldn't a mechanic have an understanding of how an automatic transmission works? Similarly, shouldn't a software developer have an understanding of how version control works? In general, a professional should have a very good understanding of the tools they use for their work as well as what they're working on.