Oh, I agree that some remakes are superior. But as you say, those remakes were done long ago. I've seen the version of The Maltese Falcon with Ricardo Cortez - not good at all compared with Bogie's. Other great remakes include The Dawn Patrol (Flynn version), Ben-Hur (Heston version).
The problem with most modern remakes is that they aren’t really remakes, they’re spoofs (ref, 21 Jump Street movie, or TIm Burton’s Dark Shadows). And the ones that aren’t spoofs are brand leverage, often times they take a story that WASN’T actually intended to be a remake (or based on), but it had some similarities, so they re-arranged some names and used the existing logo hoping to drag in that audience.