Value Proposition

Can someone explain the value proposition of AI making movies or writing novels or journalism? Say you drive down the costs. What does this achieve? More movies and novels and news articles? Has anyone out there seen all the movies or read all the novels they want to? I doubt it. In fact, my lists are too long already.

It's like AI is designed to put Hollywood out of work so they can get back to the real fun stuff like gardening and washing dishes and raising kids. 

When you step back, the thing makes no sense. Why invest trillions in this? Why not invest trillions in solving real problems? Like maybe AI could solve medical problems or have a military function, but that's not what we see right now.