Earlier quoted context omitted.
I think you may have read into this too far and/or protected a bit much onto it. How do you figure the OP is helping you attack an opposing position?
The point parent is making is that the one's own stubbornness (that they are indeed correct) forces them to skip a step -- is what they are saying true and/or what is their logical positioning? Instead, OP says "first find out how they got to that position in life" which you gotta understand does come across pretty smug since it implies superiority of opinion/belief and degenerates the disagreer as if they are merely…
You're not going to be able to convince someone who is disagreeing with you from an emotional place, no matter how much logic you throw at them. In addition, you're making it worse each time you do this, because you're ignoring what they're saying, and what they're saying is really important to them.
Listening with empathy is how you bring people to the table. It's also how you understand when to walk away. When you try to forcefully convince someone out of their emotional beliefs without understanding how they got there (and you aren't coworkers or running out of air or something) they will think you are an asshole. The less emotional / more logical person is in the best position to open with empathy.