It's no lie that some in the Catholic Church were guilty of selling indulgences.
Seems to me like you are involving yourself in a giant cover-up to deny the sins of the Catholic Church...by accusing those who bring up its sins of being liars; thus attempting to shame the people of God into submission.
Johann Tetzel had no authority within the Catholic Church? How then did Luther's calling out of his statements have any credibility with people concerning the guilt of the Catholic Church itself?
From Wikipedia (
Indulgence - Wikipedia):
The scandalous conduct of the "pardoners" was an immediate occasion of the
Protestant Reformation.
[3] In 1517,
Pope Leo X offered indulgences for those who gave alms to rebuild
St. Peter's Basilica in
Rome. The aggressive
marketing practices of
Johann Tetzel in promoting this cause provoked
Martin Luther to write his
Ninety-five Theses, condemning what he saw as the purchase and sale of
salvation. In Thesis 28 Luther objected to a saying attributed to Tetzel: "As soon as a coin in the coffer rings, a soul from purgatory springs".
[42] The Ninety-five Theses not only denounced such transactions as worldly but denied the Pope's right to grant pardons on God's behalf in the first place: the only thing indulgences guaranteed, Luther said, was an increase in profit and greed, because the pardon of the Church was in God's power alone.
[43]
Did Pope Leo X have no authority within the Catholic Church?
Really, the Catholic Church
wasn't guilty because it was only individuals within it (like Pope Leo X) who were committing those sins (selling indulgences).