Arguing to change the person's mind is useless.
Arguing to create another opinion for people stumbling over a post so shitty takes are not standing there unchallenged is totally worth it imho.
No need to go into a 20 comment deep bad faith argument - but if there's no comment calling out a shitty take then that's totally something I do think makes sense
I've met one person, ever, who has been willing to change their mind about politics based on conversation. Even better, though both of our tempers rose at various points, the tone remained largely civil.
That person is the most rational person I've ever met and, though I'm not sure the feeling is mutual, I consider them my best friend.