And they have for over a century. People loved the earliest shitty movies, so they opened a studio to crank them out. That studio couldn't produce them fast enough, so more studios jumped into the game. There was demand from the consumer for even more shitty movies. Now studios crank out more shitty movies than ever, because more people than ever demand more and more shitty movies. Shitty movies are a very proven commodity.

There has been zero consumer demand for more football league, but rich people have tried to compete with the NFL several times regardless. USFL? Lasted a couple years. XFL? Lasted one season. UFL? What, two years? Arena Football League? It's still going, but it declared bankruptcy at the turn of the decade and had to pare down dramatically just to remain afloat. AAF already has had trouble paying their players and it's been, what, a few weeks?

It'd be one thing if the NFL opened and people all agreed, "We love professional football so much that we need more of it!" That's what happened at the dawn of cinema. But that's never been the case, and every time someone tries to insist, "Hey don't you love football and wouldn't you kill to watch more of it?" the people have overwhelmingly replied every time, "Nah, we're good."