To go through the mill means to be abused or treated very harshly, but the context describes being treated in a proper manner.
Context: "I told her almost everything, including my reticence about seeing this work of literature be celebrated and treated in an extremely proper manner which was vanity publishing." Claim: "I told her almost everything, including my reticence about seeing this work of literature go through the mill which was vanity publishing."
Considering the context, is the claim true, false, or unknown?