It's important to note the differences between modern acting and writing and the styles and methods those fields employed in the heyday of silent film. Back then, actors expressed the feelings and desires of their characters in a very physically dynamic way, in a manner that would be considered far beyond overkill today. Hamming it up, as it were. Today's writers are expected to develop these same emotions with more subtlety, as the addition of verbal dialog made it possible to cease the "verbal pantomime" style of "speaking" in movies.