Politics can add another layer to sci-fi.

For example "Invasion of the Body Snatchers" is a great sci-fi on its own. But the background of McCarthyism and the red scare of its time makes it much cooler and much more entertaining and thought provoking.

I am slightly annoyed by Netflix's adaption of the book which takes the technocratic communist China out of it. I understand why it has to be like that but still we would have better TV if everything didn't have to be boiled in the same generic soup.