From the studio's point of view, it's about being safe. "This made
money before, it probably will again." And in most cases they don't have
to pay again for he rights.
Problem 1 is that some people who think like that aren't smart enough to
make a good movie.
Problem 2 is that some people who think like that think they can
"improve" on the original.
Good thing 1 is that sometimes technical advances do make an
improvement. The CGI Mighty Joe Young was a lot more interesting to
watch because you could forgetyou were looking at animation. And How to
Marry a Millionaire made good use of color, Cinemascope and Marilyn
Monroe. OTOH, nothing beats the ghost in the original Uninvited.
Good thing 2 is that sometimes the filmmakers ARE smart and do an
interesting twist on the original. Can't think of a good example, though.
Nobody complains when someone does a new performance of a play. A movie
remake might present an interesting challenge to actors and directors.
Or it might allow an update to modern sensibilities. It would be
interesting to see West Side Story without the bowdlerized Bowery Boys
language. ("Cut the frabba-jabba.")
I'm sitting here trying to think of a remake that I liked better than
the original, but the best I can come up with is Watchers II, which went
back to the Dean Koontz book. And over the weekend I enjoyed Rise of the
Planet of the Apes. I didn't really think of it as a remake until they
called the chimp "Caesar." The Children's Hour -- both versions about equal.