I agree that they made some big leaps when turning this into a narrative, but I think there's truth to the basic premise that focusing too much on a hypothetical future amongst the stars - which at best would be harsh, difficult, and miserable - serves as a distraction against the very real and very urgent and very solvable problems facing our species and habitat as it exists right now.
Even if we managed interstellar travel (and that's a big if), it's highly unlikely we would ever find anything remotely as good as Earth, when it comes to being tuned precisely for our human needs. Evolution has geared us for this world. We might be able to cobble together a survival elsewhere, but I doubt we could ever thrive.
Beyond that: space exploration and research obviously still has value. It's just that it's a very long-term and theoretical value, and at this particular moment in history there are much more pressing concerns.