not all games are (should be) made for as broad an audience as possible
The problem is that when a AAA game costs three hundred million dollars to make due to all the performance capture and famous actors and high fidelity graphics and whatnot, you have to reach as broad an audience as possible in order to make that money back.
I think this is what's killing the blockbuster movies, too. Everything needs to be lowest-common-denomenator to have a hope of turning a profit.