The question is quite straightforward, this could be for any reason, or multiple reasons. Science you didn't know of, relation to the real life, narrative, sound design, acting and so on.
It could also be because a sci fi movie holds an important message, dangers to technology, or just another take on how we perceive things.
The fiction is sci fi is interesting because with some sci fi movies the fiction comes closer to reality as time passes by, or it gives you another take on certain things immediately.
It doesn't have to be about that , it could also be because the movie is extremely well made, or both.
Make sure to use the spoiler bar accordingly