Interstellar might be one of the few newer breed of films that actually casts human space travel in some positive light.
In fact one is left wanting for instances of the "techno-optimism" - mindless or otherwise - that you describe of, in Hollywood flicks.
List of dystopian films
http://en.wikipedia.org/wiki/List_of_dystopian_films
A simple Google search
A good number of the films listed by Wikipedia as dystopian technology is working out just fine for most people while disenfranchising a few - much as in our own world. Insofar as dystopianism is aesthetically fashionable it's largely reflective of contemporary economic or political anxieties rather than being predicated on technology. Total recall (both versions) are listed as dystopian, for example, but those films are quite neutral on the impact of technology - the dystopian element is that of economic coercion resulting from a natural monopoly (oxygen on Mars in the original; the labor supply chain in the remake).
I could dig into examples at length and compare them with positive and negative views of the future from earlier eras of film, but I'm not sure it would be worth the effort given your needlessly snide tone.
On the larger question of why we don't have a lobby to fund basic research, I don't know - perhaps because nobody wants to expend political capital on research that might not be patentable or commercially exploitable, plus you could argue that private capital is already performing effectively in that area. I think it's absurd to pin the blame on Hollywood and think it's more to do with the limitations of our geographically representative form of government, which makes alternative electoral structures like party lists impossible. Probably the best hope for blue-sky scientific research is a new cold war, sadly :-(