I just think that expecting a man to remain celibate for life, is just setting a lot of men up for failure.
I'm not saying that their aren't plenty of priests that do remain celibate. However, no one should be surprised when a good amount of them break this vow.
Interesting choice of words.
Substitute "fall in love with a single woman" with "engage in fornication with a woman who was still married in the eyes of the Church" and you'll have the truth of the matter.
Add to this that he was not just any "single man" but a man from whom she had sought pastoral direction.
No traditional Christian denomination approves of such behavior.
A lot of men aren't called to the consecrated life. That's why the formation process is such a lengthy one. However, your rationalization is the same used by many married men to justify engaging in infidelity. After all, monogamy is a lot to ask of someone who can't or won't control his libido.
However, no one should be surprised when a good amount of them break this vow.
Quantify "a good amount".