I hear you in some respect, for the most part a lot of the remakes occurring are due to studios and their smaller "independent" production house are happening because they know that if they put their efforts into an already successful franchise they will be able to make enough from Box Office and DVD sales to pull a profit and deliver a mediocre film that will be loved by the hot topic moviegoers.

In the defense of the remake though, there are some that were definitely for the best. Obviously "Hills Have Eyes" not only because (my opinion) it was superior to the original, it brought the film to an audience that would've never have seen the original. And if they had, they probably wouldn't have liked it all that much. The sad truth is that the films in the most need of a remake treatment are the ones that are least likely to be considered due to ownership and lack of bar graphs that could guarantee they make at least the money spent on the film back.