Shouldn't remakes be better?

Cold, rainy, snowy (for a while), didn't leave the house today. I cleaned the kitchen, made a double batch of cookies (will take some to Ellensburg this weekend), read my library books, and didn't do much else. We watched a couple of movies this afternoon; a Demi Moore movie about an author who loses her young son and moves to a remote village in Scotland, and the latest Netflix movie, a pointless remake of Predator. I didn't like the original, and although this one had better special effects, it still didn't have a plot. I don't see the point in remaking something if you can't improve it. Seems like a waste of effort to me.