But it isn't helpful to the conversation either.
On that point, I agree. Doesn't make it childish. It makes it a poor decision.
I think they have a decent grasp of psychology but the theme suffered with BTS drama. Because, even with Lorca being from the MU, you still had Sarek and Cornwell struggling with the same dilemma.
Was it done well? I'm going with "No." But, it is there.
Except its not there to look cool. It's doing the same thing that the Mirror Universe has done in Trek-offer a darker, if somewhat campier, look at negative aspects of human behavior that we are not as far removed from as current humans would like to wish.