Becoming a priest, nun, or monk is a choice. Celibacy is not imposed on anyone, but those who choose it seem to get by just fine. Black people, on the other hand, do not choose to be black.
Some opt to be not black : http://www.bbc.co.uk/news/world-africa-20444798
There is a history of people using the celebate status of those roles to hide shamed sexual preferences or hidden desires. But it’s a question of Catholicism ethics. It has no biblical endorsement but people know the score when they join up.