I've lost count of the number of times I've been listening to two people talk to each other and they both have no idea what the other is saying. I'll understan

I've lost count of the number of times I've been listening to two people talk to each other and they both have no idea what the other is saying. I'll understand both people and know that the response doesn't follow what was just said by the other person, but then the other person will respond in kind with something equally or more ... non sequitur for the lack of a better word. Then I think, "How many times have I, myself, been in such a conversation?" How much of what someone is saying to me do I think I understand but really didn't? How many times has someone said to me, "You aren't understanding what I'm saying." and I say, "No I get it!" But I don't. And then what do I do in that situation? I used to say stuff like, "Wait a minute, you are talking about Looper and you're talking about Inception and you both think you're talking about the same movie." But then I just decided to let them talk and not worry so much about miscommunication. It seems like such a high percentage of communication that I realized it doesn't really matter. Talking to someone isn't about communicating ideas, it's mostly about the comfort of having someone to talk to. Likewise, podcasts, youtubes, etc are more about the background noise than they are the content. People just don't want to feel alone.