Subtitle files are arguably transformative and have a more benign character and purpose. They would have a significantly better fair use argument vs this. The purpose tends to either be to help the disabled or to assist non-native speakers in understanding the spoken dialogue track of the film. They also don’t directly compete with the underlying piece of copyrighted material (the screenplay) in the same market (publishing). A subtitle site could still easily end up on the losing end of a copyright suit but my point is this is far from an apples to apples comparison just because they both deal with text and audio/visual media.