Criticizing DEI is fine. Acting as if it isn't effective when properly implemented is on the same level as "advocating flat earth" theories, as they both fly in the face of a whole lot of data.
And you're right, claiming something does not make it so. What makes it so is all of the data supporting it, which is readily available to anyone who actually cares about this topic (up to you if that's you).
And you're right, claiming something does not make it so. What makes it so is all of the data supporting it, which is readily available to anyone who actually cares about this topic (up to you if that's you).