Catholic Priests have been expected to be celibate so clearly expectations over human behaviour don't mean much on long term and many people.
I mean if you break it down per capita, Catholic priests are far less likely to sexually abuse kids than school teachers are, so there's likely some sort of effect on behavior (and/or selection effects amongst those who choose to become priests and teachers).
That is why I said "on long term and many people". Buddhists also over a long time period and in aggregate compared to other religions do seem non violent.