I don't think she meant classics like Dune, Asimov's works, Bradbury etc. and more the TV/movie Science Fiction, which more or less sacrifices a good story for spectacle and action ( which sells way more tickets/books than cerebral works). Let's be honest - the Stargate franchise, which she was part of, was mediocre from the writing point as well as some Star Trek episodes ( while others were absolutely brilliant).
I remember years ago you getting on my back because i said that the Star Wars Expanded universe books were mediocre when you get down and really read them objectively. However that doesn't mean i can't enjoy them, it's just that they are not that memorable and won't be read in the decades to come unlike Asimov or Herbert's Dune series.