The golden-age optimistic science fiction placed humans on a stage in the future with aliens, and confronted both with challenges on a far greater scale than earth. The implication that today's problems would surely be solved, was not only a nice escapism but also helped to form a fundamental mindset for the solution of said problems. From terraforming other planets to thinking about carbon dioxide globally, from a war with aliens to seeing the futility of wars on earth. From the absense of actual capitalism or communism on that distant colony in space that lived in harmony, to being open minded about new solutions in everyday politics.
It does not seem clear if pessimistic science fiction, from an author not from the "ivory tower" but the trenches of education in community college, written with an educational message front and center, can have the reach and cultural impact as the stories from the past. Will the classroom in space convince where the daytime job didn't?