That’s simply not true and strongly suggests that you either did not understand who I am talking about or ypu have no education in the field.
Im talking about the people who come to Marxism by deciding it is correct and then seek to only pursue information or sources that back Marxism rather than learning about the various flaws that absolutely exist in Marxism as they do in any ideologically driven perspective. If you actually study econ you should have some grasp on the flaws of a system in broad terms.