There's some nuance to this. First, the left is pretty selective on science. Conservatives would love science if they looked into racial science and how things like IQ and the heritability of certain behaviors, including criminality, completely refute the white privilege / racism narrative. The left is anti-science, but since they own the media, they can turn eyes away from the science they reject. Second, science is often quoted for batshit insane ideas. For instance, I'm not a skeptic of manmade climate change, but I recognize that there's nothing scientific or pro-environment about saying that giving billions to the third world will somehow solve global warming. Conservatives hear this batshit insane shit under the guise of science and, not being confident in their scientific knowledge, reject science all together. If conservatives knew that immigration was the worst environmental thing we can do, they'd suddenly love science. Third, science is getting less scientific by the day. The hard sciences are still safe (though they're trying to shoe in things like "feminist biology"), but conservatives hear sociologists spinning narrative instead of presenting data and they are rightfully skeptical. Fourth, some of it's pure psyop to smear the right. I've literally never seen a real flat earther or flat earth communities, yet we're told it's this big massive right wing push. And last but not least, this is probably just false to a large degree. Conservatives are more likely than leftists to major in STEM. For all we're told about being anti-science, we're the ones who actually study it on our own and then try to make careers out of it.