Yes, someone made them up. But reading between the lines, those words seem to imply that someone "just" made them up, and as such anything you happen to "make up" is equally as valid.

The thing is, most of those patterns and standards and architectures are not things that someone "just" made up. They're also based on the results of extensive collaboration and research and study. And they exist and are still taught and used because they've also withstood the test of time.

Senior devs have made plenty of mistakes, true. And that helps when approaching a new problem. But we also have those patterns and standards and architectures to rely upon and guide us.

Almost anyone can throw together an application and write "code that works". But making an application that works well, that's performant, that's testable and easily extendable... that's a lot harder.

And it's not something that can easily be "faked".