The charge of “scientism” is inaccurate.  Scientism is the belief that science can answer all questions, including philosophical questions about values and meaning.  She didn’t say anything that implied she believes that. She did imply that certain religious beliefs, such as literal interpretations of creation myths, are contrary to science.  She also said that the outright rejection of science in favour of religious beliefs or superstitions hampers our ability to solve serious issues like climate change.  Those are philosophically valid ideas, which cannot be shrugged off as “scientism”.