Not to point fingers at anybody, but this overall statement is true. I was just getting into filmmaking, when STAR WARS came out in 1977. Until then, Hollywood frowned on sci-fi as feature entertainment. Seriously, think about it!!!! The execs at 20th Century Fox doubted that STAR WARS could perform up to the bar that 2001: A SPACE ODYSSEY had set. SILENT RUNNING and LOGAN'S RUN were height of the competition.
With STAR WARS a huge success, studios and production companies were in a huge rush to put out sci-fi, including such fare as LASER BLAST and STAR CRASH. The floodgates opened.... A huge audience was awakened that wanted to see horror, sci-fi and fantasy. MAD MAX, DAWN OF THE DEAD, PHANTASM, HALLOWEEN, FRIDAY THE 13th, ALIEN, SUPERMAN etc. all became huge hits, even though many had a very small budget.
Bottom line? STAR WARS success is good for everybody else.