Depends on the person and how well they are aware. Ive had discussions with people who were all over the place on the political spectrum. In the end with some i had a calm talk and exchanged ideas, that have made me realise things that could lean both ways and in others i left angry, but not changed because i was aware what was happening with me, emotionally, because of the discussion.

It isnt for everyone, ill grant you that, but self knowledge and being open to new ideas is key when talking about mundane politics ( and not extreme topics )