There's been monopolies on them for some time now. Madden started it around 2005 when they got rid of 2k. This isn't new.
NFL is the only sport where there's an actual licensed monopoly.
While we previously had more competition, a lot of that competition wasn't actually very good and was often just trying to cash in on these licenses.
Blitzkrug summed up nowadays pretty well.
NFL - EA got the rights so it's a one horse race.
MLB - The Show decimates anything, 2K's offerings were a joke.
NBA - 2K decimates anything, killed EA to the point that they had a game go gold and then didn't even release it.
NHL - 2K packed its bags and went home leaving only one player in the game.
Football - Actually has two great franchises in FIFA and PES. But it's also the biggest sport in the world with a much bigger market.
Despite the lack of competition, the quality of the likes of The Show and 2K is phenomenal. There's no room for people to just jump in the race nowadays like there once was, if you can't compete with these elite franchises then you you won't be successful.