The gemara we have today - the Vilna edition - was printed by a non-Jew who did it for the money. No rabbinic council approved it. The drive of Christian censors to control Jewish minds still influences halachic decisions today.
Part Two: Why do some rabbis prefer a censored text to a corrected version? The answer: misplaced respect. But think: Did your forefathers really want you to read what the Pope wanted?