I feel like no rational person would stand behind 'you are incorrect because what you are saying sounds like a conspiracy theory and there have never been consp

I feel like no rational person would stand behind 'you are incorrect because what you are saying sounds like a conspiracy theory and there have never been conspiracy theories.' This is a straw-man. An easy-to-dismiss opposing narrative. And one that can be used to drown out a wide array of incoming narratives by surreptitiously reducing them to this one, then dismissing this one as it was basically designed to be dismissable.