I realize that people besides priests engage in unlawful sexual behavior. However, because of the limited number of people who are willing to choose priesthood, and the elimination from consideration of women, the Church is anxious to hold on to anyone willing to do the job. In other fields, there is much less reluctance to fire the culprit, except if they are very rich and powerful, and even they have to watch their step these days.
However, the West had mostly-celibate clergy for the first 1000 years, and all-celibate clergy for the next 1000 years, and no real recruiting problems EXCEPT when the standard of holiness and sacrifice were lowered. When there is a bracingly high standard of holiness and sacrifice, the men who want to fast like ascetics and train like Olympians, to give their all and be the best --- who want to be the Recon Marines --- come pouring into the seminaries.
When Queen Elizabeth I -- bloody Bessie! --- made being a Catholic priest a death-penalty offense, Douai was swarming with men begging to become priests and be sent to Britain. When the Mohawks were roasting and chewing the fingers off of Jesuits, the most whole-souled, Jesus-My-All, brave and beautiful-hearted men on God's good earth, wanted to be Jesuits.
Even during the brief monastic and missionary-flowering of the U.S. Catholic church, 1945-1965, they couldn't build friaries and seminaries fast enough. Even small dioceses had 2 or 3 seminaries (I'm thinking of Erie, PA in the late-50's) and everybody wanted to go to Tanganyika (as it was then called) or to the Trappists.
But you go fat and slack and faggotty, and the bishop is willing to maintain every and any priest until he's pensioned off, just to keep up the Sunday Mass at St. Casimir's.
Holiness first. And celibate male ordinandi will arrive in battle array.