It is hard to argue that you’ve been fully catechized. You know what the Church teaches and you reject some of it on your own authority. Those are not the same thing. Your conscience is binding when it is properly formed; to 'follow your conscience" does not mean you have carte blanche to re-write moral law. I don’t think you are arrogant, however; I think you have merely gotten the wrong idea about what a moral conscience is an how it is to be formed. At any rate, there are no areas of human morality where the prevalent is the same as the moral. People commonly lie to each other; that doesn’t make lying OK. Little kids steal things, sometime: typical, but not according to a moral norm, and therefore not “normal”.
To the point that Jesus never spoke on homosexuality, that is silly. He never spoke about pedophilia or necrophilia or incest, either. Since homosexual acts were openly endorsed by the Greeks and Romans and were considered disordered in his time, then what do you do with his contention that he did not come to do away with the Law? Which sexual mores
did he change?
None. He was compassionate to those who fell into sin, but he enlarged none of the boundaries. If anything, he was even more strict, saying that those who indulged in lust were guilty of adultery and divorcing a spouse you don’t like is forbidden–a point, incidentally, that some “well-catechized” Catholics feel free to ignore even though he was entirely specific about it . Certainly the Epistles (written prior to the Gospels, by the way), were clearly against homosexual acts.
The Church is not against an arrangement where adults take care of each other. Stable, caring relationships are fine. They just aren’t marriage. They just ought not have sex unless they’re married. Within marriage, sex ought to be open to the procreative aspect, even if one seems about as likely to become pregnant and Abraham and Sarah. Marriage is a particular and special thing, a thing having to do with generating and maintaining families. It isn’t about adults who want everyone else to give them social status because they’re sex partners. In the absence of procreation, after all, why would a couple having sex have some status that a couple not having sex wouldn’t have?