Why would anyone want that? I don't want infinite movies, I don't have infinite time. I'd rather have intent over quantity. There is already an abundance of content, a century of cinema. Who actually wants this and why?
But what if you could have the movie you want exactly with the story and characters as you envision them. You may not want that still, but I guarantee you there are people that will.
I read books and watch movies to engage and be moved by stories I didn't know I wanted, that surprise me and/or leave me thinking for a while.
I loved Annihilation and it's sequels, not knowing what I was getting into. I would never have come up with those stories. And a one to one translation of the text to screen would have left us without an interesting movie on its own right.
When there is a large portion of society that realises this is a way to say, "what if I had every social interaction in the setting I want, with the characters I want, with the response I want, where I say exactly the right thing" and choose to spend all of their leisure hours generating imaginary worlds to make them feel better there will still be people saying, "and so what if they do? If people will pay for it, ultimately the market decides"