I don’t like this notion that good conversation must somehow be dishonest. To my mind, the key is being sympathetic to your interlocutors—sympathetic in the old sense, meaning understanding and sharing their emotions.
"Getting along with the rest of the world" might be a translation, similar to the french notion of savoir être (as opposed to savoir faire)...
Positive disagreement seemed like a good example of being honest in a pro-social way. Expressing your honest view in a way that doesn't shut anyone down.
The author argues that mirroring people's opinions is boring for the other person.
It’s also a major red flag in interpersonal relationships. I tend to keep my distance with people who use mirroring tactics because it can often be a sign of underlying personality disorders (chameleon effect).
How did you learn that? (I think you’re right.)