I think there are many people, Protestant and Catholic, who go into the religious life because they think that zealous devotion to God will help them control desires they recognize as sinful. Unfortunately, this seldom works, particularly as people in positions of authority in any church are subject to many temptations. One sees this in Protestants and Catholics alike. And Satan does like to tempt and ruin those among us who could, if pure, make major contributions to fulfilling God’s will on earth.
There’s a reason why the discernment time in a seminary is as long as it is and why seminarians have many opportunities to exercise their free will and voluntarily leave prior to ordination.