Everybody within a business should be using the same language and concepts when thinking about the business, because it's important for effective communication:

Everybody within a business should be using the same language and concepts when thinking about the business, because it's important for effective communication: daylight between what people are thinking about is where problems creep in. The role of any people of any discipline within a business is to use their expertise to shape _how_ they think about the shared _what_. Code is just one tool (of many) that a business will use to achieve its goals. There's a mythology in a lot of businesses around the genius of technologists because we understand the complex system that we built that everybody else in the business is too dumb to understand, but in reality it's because technologists are uniquely permitted to decide they're better than everyone else and diverge from the shared thinking because it's easier than reconciling business concepts with technology -- which is where the actual hard part of software engineering is! If you walk into any business that has been around for a few years and has allowed their technology team to do whatever they want, you'll probably find a completely incomprehensible system that the business hates because it has diverged so far from how they think and what they want that they can't effectively do their jobs. People come and go, the only constant in a business is the business. An example that comes to mind is a business that has customers who pay for membership, and so they're called "members" within the business. However, the development team decided they knew better and implemented "user" accounts which can have a "subscription". Then, later, the business decided to introduce a subscriptions product... and so the problems began.