Hi @Kate_Sturmey! Welcome to MDN and thanks for your contributions during the past month!
You’re right about the key aim of the MDN community. In fact, MDN’s mission is “To provide developers with the information they need to easily build projects on the web platform.”
I also agree with you about the importance of documentation. Especially for programming languages and API’s, the documentation is the “user interface” — the user just happens to be a developer. The doc is what tells developers the things they can do with an API, and how to achieve their goals. And since web technologies don’t come in a shiny box from a single provider, we provide those docs here on MDN.
Of course, I realize I’m preaching to the choir, but it’s nice to make these things explicit from time to time