Yserb, the way you describe the process in publishing Rav Hirschs writings is not altogether accurate. In “collected writings,” there is a controversial essay about chazal and science, which was not written in Rav Hirschs handwriting , was found in his study, and was included, because someone on the team said it “must” have been written by him, despite its being considered heresy according to rishonim and achronim across the board.
So maybe they usually were careful, but there were definitely cases of mistakes.