It's not really "making a huge deal of it" for them to clarify that they're speaking from a position of authority on this. If they actually know, and what they're saying isn't just a super-confident guess, but is actually what's going on, that's helpful. Then we can stop speculating from a lacking knowledge-base. We can put this particular aspect of the game to bed and move onto whatever's next.
The fact NYCC will make it known as well isn't really the point.
If they have information, and they shared it here, it's not making a deal of it to verify that they're speaking based on that information, so people don't get confused between whether they're speculating or whether they're speaking factually.