Those guys don't work at Microsoft, they just copy/paste from the guidelines, this is a general problem in the industry, is the reason I don't bother contacting support anywhere.
Also have to keep in mind not everyone at Microsoft works on Windows, and even the ones that do, focus on a specific feature not the entire OS (that would be ridiculous).
So if you ask a developer who is working on Mail, what the Browser Broker is for, I doubt he'll be able to answer properly, but if you ask the Microsoft Edge Team will be a different history.
Those Forums are for casual users at most as well, there's MSDN Forum for more advanced users.