12 NFL teams make it to the post season tournament. And yes the eventual winner is the WORLD CHAMPION. Deal with it.
There's nothing to deal with!
I can declare myself as World Tiddleywinks Champion of my street but it it would be meaningless and hollow, just like the NFL's hype is.
Being "World Champion" of a purely domestic tournament that has no International component?
So what?
I guess it fools the dupes, doesn't it?