Tom Preston-Werner, known as @mojombo, discusses his blog post on learning Git by exploring how a Git-like system could be constructed from first principles, aiming to demystify its powerful concepts. He criticizes traditional teaching methods that focus on memorizing numerous commands without providing an understanding of the underlying principles, which can leave users feeling intimidated by complex tasks. By delving into the foundational elements that make Git effective, Preston-Werner seeks to help users overcome the sense of unfamiliarity and fear often associated with using Git beyond basic operations.