We absolutely do some of the best science in the world in Canada, across a broad spectrum of disciplines: quantum computing in Waterloo, paleontology in Alberta, neuroscience at the Djavad Mowafaghian Centre for Brain Health in Vancouver, and many more.
Bradbury was the one guy who was published in places like the 'Saturday Evening Post.' He was the guy who brought science fiction to the masses. If he hadn't existed, science fiction would have been a well-kept secret in literature instead of a widely consumed phenomenon.
I think there's always been, to some degree, a misunderstanding about what science fiction is all about, in that it has been judged by the general public as being literature of prediction, and it isn't.