Heh... well, you are correct that the NFL doesn't own the rights to the game rules of American football... but as we have seen time after time after time... nobody can make their own version of a professional American football league and actually succeed. They may try and follow all the rules of the NFL-- change a few things here and there-- but they still can't get many people to watch it because the fact is, it's really not the game itself people care about, it's the brand. People watch the NFL because it's the NFL, not because it uses a very specific set of American Football rules that everyone care about.
So it just felt like this person was saying that because they loved the NFL that they had the right to own a part of the NFL... when in truth what they are really making is the
USFL. And those ain't the same thing.
In truth it doesn't actually bother me... KP can make whatever they feel is best for them, and I know there will be an audience for them. And that's great. But it was just that one comment that struck me as... "Really? You think you deserve to own a piece of the Dungeons & Dragons brand just cause you love it that much?" It just seemed a silly comment. But no harm, no foul.