In No way
In no way did I try to apply divorcement to a Eunuchs position if such a Eunuch existed, ie; sterile, as you say then making ones self sterile is a far jump to castrating oneself. It is impossible to make yourself sterile, although it is possible to castrate yourself for sake of being a Eunuch. Both times Christ describes these men as they are for Heavens sake not for the sake of man. Your description is off. Eunuchs where renowned as trusted guards of the Roman Empire, staying close watch to queens or women of state, this fact is a matter of history and as Christ proclaims there are those men whom are born to such and those whom try to mutilate themselves to become these types of men as they where trusted individuals and wanted positions that the Natural Eunuch held. As you state it would make no sense for Christ to distinguish between the different types. How do you make yourself sterile for Heavens sake? There where plenty of monks and priest in Christ day that practiced Celibacy why not then did he just use the word celebate instead of Eunuch. Don't confuse the issue, I am not saying one way or the other that homosexuality is a sin only YHVH knows.