There are LOTS of ideas.
So many firms are buying up the TV/Movie rights for all those novels…
…and yet the people who are to produce, and the directors and those making them, are “creatively bankrupt”.
It is always easier to redo/remake something that has happen before (you already know the story, etc), than to make something new.
And boy are they big on doing trends.
If they see something work, then the rest quickly jump on the bandwagon.
Originality is not a quality they want anymore. They want the quick and easy and proven.