I am not sure that the word "dashing" is the best approach, although it sort of aligns quite well with an anti- science belief system. I would more prefer to use the words "grounding" or "disciplining" our imaginations with a greater knowledge of reality that only a scientific approach can provide. Ever since Plato killed the gods when the demand for evidential support for beliefs became the norm, mankind's natural paranoia subsided for as we know, fear is placated by knowledge, facts, physical laws etc.. The famous Salem witch trials are a classic example of unbridled imagination, fear and injustice. 18th century Psychiatric institutions were full of people with "unbridled imaginations" attempting to cope with the industrial age and all it's inherent concerns. So the scientific approach actually allows the imagination to become more useful, enhancing it's productivity rather than diminishing or dashing it's self.