I’ve gotten responses that showed that what I wrote was accepted. I’ve also been shown to be wrong.
Keep in mind that while most often the one you are directing your post to won’t change their mind, especially if their main goal was to change yours, you are convincing those reading it. As I wrote in the Mechitza thread, we are posting to the audience. Sometimes, a person will continue an argument, because they lack the ability to give in, while on their inside they feel the punch. What you gain is that they won’t bring it up again.