Question

Hello and blessings to the honored Rabbi,
Why has the Rabbi written several times in the past that in a debate, and in general, one should address a person’s arguments and not the person himself—that is, not what lies behind the arguments?
After all, many times his arguments come because of things in his background and events that happened to him and the like, and if this is a person you know and not a debate with a stranger, then seemingly it would be easier to defeat him and answer his claims by understanding where they come from in his case.
What would it help me to discuss for an hour with someone who became religious all the arguments he brings for becoming religious, when in practice he became religious because he thinks a miracle happened to him, only he wants to appear rational so he invents arguments? Even if I crush all his arguments, that will not cause him to stop being religious, Heaven forbid.