We see videos coming out of the Gaza strip. Maybe "face-to-face" was overstating it, but we really do need to be able to see and hear people to make them real in our minds. We struggle to empathize with random strings of text on a screen.
You can still do it if you try, but when you're "debating" people the relationship is inherently antagonistic. People usually aren't going to try to empathize with the enemy, they're going to try to win. That's why debating on the internet does not work.
Watch, you'll now keep arguing with me because I can't convince you of anything, because I'm an NPC in the posting RPG. Your goal here isn't to listen to anything I have to say or trust that I have literal decades of experience arguing on the internet at this point, your goal is to defeat me and gain upvotes. I'm not real, I'm just something getting in your way.