Kind of a hard question to explain but i’ll use this anecdote as an example.
Let’s say there is a man who all his life wanted to become a priest. At 18 he talks to the local vocation director and everything checks out. The young man is living a life of grace and holiness and seems to be an ideal candidate, but its soon found out that this young man has a tough time in school and might barely be able to pass high school let alone seminary courses. This man is rejected and he doesn’t have a vocation.
Now I understand that yes their are certain requirements to be a priest or religious or married. My question is what makes the difference between having a vocation and simply being attracted to the lifestyle of a priest? If be chance he had been born with the mind of a class valedictorian the man would be allowed into seminary. Why would God allow someone to be "attracted"to the point that they go so far only to be rejected. Also why does this “attraction” feel like a calling? Are our feelings that mysterious that it leads us to do things we can’t do? I mean i’m sure a few woman priests (which btw I don’t support at all.) would say they have a “calling” (granted I think most just want to be bothersome feminist types).
I guess what it comes down to is, why would God allow someone to have attraction or feelings for something they could never have? To me it seems cruel. I know it is a fact of life (and with good reason. We need the best men to be priests and the best people to be religious brothers and sisters and to be married) but to some this can be such a crushing blow.