I can tell you that the norm among engineers, even at Google, is to receive lore and anecdotes from people slightly more educated as if it were gospel, and to repeat it uncritically until someone else more charismatic comes along. This happens so often that someone wrote a book called [The Leprechauns of Software Engineering](https://leanpub.com/leprechauns) about the unsourced commmon knowledge that engineers will blindly repeat without thinking about it.