It was an amazing idea to slice and dice the thoughts of smart people into an insane salad, dress it with some insights from random quacks as deep as a tea spoon, then serve it as a "documentary".
How did Cameron deserve a right to have an opinion about the A.I.? By making a movie with a robot in it?
He also made a movie with a ship in it - well, now, let's ask his opinion on naval architecture and the problems of modern hydrodynamic engineering.
Instead of letting the smart people express their smart thoughts precisely and at length, the movie rips their words out of context and rearranges them to fit some weird alarmist narrative.
The four stars are specifically for Roman Yampolskiy, Sam Harris, Max Tegmark and Jurgen Schmidhuber.