Even a century later, so few people live in space that kids don't even believe that once there were billions of humans.
Uhm. What? Don't remember that in the movie. At all. People were pretty well aware of what happened. What with the fact that there were still people alive who had lived on Earth. (Basically anyone over 40.)
I mean, the biggest failing of Interstellar that it hamfistedly forces "Space Travel= Pro Science. Trying to save earth= Moon hoax idiots!" on the viewer. Genetic engineering or athmospheric chemistry or whatever to solve the problem happening on earth is more science than building a rocket to go look elsewhere.
First off, it's a work of speculative fiction, and while all disciplines of science are important and interesting, a movie about heroically engineering a blight resistant strain of wheat was not going to be nearly as interesting as a love letter to that old SF heart throb, space travel.
Nevermind that Coops message was only decipherable rather than the meaningless gibberish heard by a crazy, bitter, middle aged lady because his daughter was a trained mathematical prodigy only lacking the final pieces to bring the puzzle together.
Or that she only got that last piece because her father overrode Brand when she made her cringe worthy appeal to love. Brand was using love as an irrational metaphor for her desire to rescue the man she had romantic feelings for. Coop was using it when he was delirious with joy over the fact that he might manage to save his family.
Neither of them were asserting any special metaphysical insight into the cosmos, they were just being human. And that's kind of where Insterstellar really failed. At the interface of its speculative science and human aspects. Actually I think Interstellar is weaker for the fact that it can't stick with one or the other and intstead fumbles both.
(Also, stable timeloops are the
worst brain rotting plot candy in sci-fi. Please stop.)
I mean, interstellar is basically the apocalypse scenario, more tactfully done than most, for pro-science pro-space travel people and I agree. But its flaws are a little more nuanced than
just that.