Thats why. Money is the answer for everything.
Thats why also music is going to a bad way, just imagine before, when we had mozart, beethoven, The Beatles, deep purple, etc.. and now we have bad music, but this music give more money than the real legends.
Movies is going to the same way, money is the answer
Edit: it doesnt change the fact that what gives more money is more shit, as we can see