Martin Luther was very bothered by the idea of indulgences, and even though he wished the church would return back to it's ways when it wasn't about power and wealth, his target was Johannes Tetzel; which, I believe was his motivation to create his theses. Johannes sold indulgences to clear the debts of the Archbishop Albrecht and to fund the rebuilding of St. Peter's for Pope Leo X. I believe he was making his point through theses and thought it would be considered as an act of acedemic freedom, therefore, a satire towards the
