If you're talking about an adaptation of Foundation and bitch about the psychohistory instead of the telepathy, you've made a fundamental misjudgment about what's the softheaded part of the story. Everything we know about history shows we can't predict details but trends are something else. This is particularly important since the details aren't probably not really important in the larger perspective. In particular, random events will not change trends, precisely because they are random. Telepathy on the other hand is as sensible as astrology.
In the story, Seldon doesn't just predict, he manipulates, not least by creating the Foundation. And by the time we get to the end, every Seldon appearance could be an hallucination imposed by the Second Foundation!
In the real world, of course people will still insist the future is wholly unpredictable. If it were predictable, then someone might be held responsible, say, for ruining an entire nation's economy. If shit just happens, then all you can do is suffer, preferably in silence.
That said, there is one aspect that will prevent social science from ever being powerfully predictive, which oddly enough a science fiction writer either overlooked or chose to ignore: scientific and technological progress. It is not because the human factor is too divinely ineffable to quantify. Scientific and technical progress depend partly upon what nature is really like, and no social science could be expected to predict unknown physics, chemistry, etc.
If you want to do away with the psychohistory, all you have left is a comic book story about telepaths, minus the pictures. Presumably the movie is to supply them, but it will still be just a comic book movie.