I think the answer to the question is that when we first begin genealogy, and first look for sources, seeing any hit on any new record is like finding an Easter egg when you were a kid. You're excited at the prospect of locating relevant data, and you don't question the find or invoke any mental process of evaluating accuracy or quality. It's only after gaining a little experience, and seeing some inconsistent or contradictory records, or seeing more experienced researchers express skepticism about a source, that you begin to realize that not every printed word is gospel, and that the records were created by humans who sometimes made mistakes.