Humans don’t like to be wrong.
If you try to prove to someone that they are wrong, you’ll probably just end up reinforcing their existing belief, and, as a defense mechanism, they’ll slap a label on you (crazy, eccentric, dumb, evil) that means they don’t have to listen to you.
And the strength of that defensive response will be proportional to how deeply-held the belief that you are challenging is. On this continent, at least, views on “how sexuality, mating, and families are structured” are very deeply-held. If you’re not exceptionally gentle in your attempts to challenge them, you’re going to be shut down very quickly.
