I know that you disapprove of people looking at doctrines and deciding for themselves whether or not to accept them. I keep saying that your model is Adolf Eichmann, because like him, you  accepted what you are told without question. For obvious reasons, Eichmann is a bad model to follow, and reasonable people reject it.

Yes, actual Catholics do pick and choose which doctrines to accept and which to reject. We understand that some doctrines are central to the faith, and others are not. "Contraception is evil" is relatively minor compared to "Jesus Christ is both God and man". Many Catholics reject the first, because the reasoning behind it has major flaws (and that reasoning was done solely by unmarried men, who automatically have an incomplete -- if not wholly wrong -- idea of the place of sex in marriage); but no Catholic would reject the second. The second is one of the pillars of the Catholic religion, the first is on the outskirts.