I have a nascent theory I'd like to bounce off you all.

It is that media should not be remade in the same form that it was initially conceived. If something was originally made as movie, it should not be remade as a movie. If something was originally made as a book, it should not be rewritten as a book. I would differentiate plays from movies in that the script for a movie is solely a means to an end (and constantly open to revision) whereas a play is written and released in a single form to be interpreted on a stage multiple times. And TV shows are episodic and open to future 'continuation' or re-imagining that goes far beyond simply rewriting the original scripts.

My reasoning for this is that it is absurd, uncreative, and demeaning of the original creation. We could rewrite Shakespeare or Stephen King but why?

I've tried to think of examples where something has been remade in its original form. One suggestion I got was "Hairspray." And that was a movie, turned into a play, turned into a movie. I'm not sure if the translation into a play made it more amenable to remake as a movie. It does seem a generally bad idea to create the substantially same story in the same media. But what are your thoughts?