ChatGPT (Gemini/Anthropic/etc) have the advantage of never getting sick of arguing with me. I can go back and forth and argue about any weird topic that I want for as long as I want at any time of day and keep learning until I'm bored of it.
Obviously it depends on the person but I really like it.
Beyond just subject-wise, finding people who argue in good faith seems to be an issue too. There are people I'm friends with almost specifically because we're able to consistently have good-faith arguments about our strongly opposing views. It doesn't seem to be a common skill, but perhaps that has something to do with my sample set or my own behaviors in arguments.
Politically? Yeah, nearly impossible to find anyone who argues in good faith.