Negging - Wikipedia
From my point of view Shikamaru is deliberately trying to convince us that we have less value. He also gaslighted us by concealing that Ami was already in leaf at the time we talked to him. Generally he's acting super manipulative from my point of view
Hmm, do you want to deal with getting Keiko ready for a wedding when she knows Ami is going to be there?
I sure don't. Yeah, it's a lie but I can absolutely understand why he did it. Especially once you acknowledge how much of a ticking time bomb Ami is.
Plus he's not trying to make us feel bad or worthless, in fact he's being refreshingly direct. This has been a constant pattern when the thread deals with the Nara.
They are not insulting you by being direct! They are showing that they trust you to handle the truth.
Really, we made this mistake with Shikaku already. Do we even need to do it again with Shikamaru?
Some of the communities I'm in IRL act the same way. When I had newly joined my lab, I had to hold back tears when my teammates critiqued my writing. But direct, forthright feedback was the best way to get me to improve my writing fast.
Now, when I work with people who don't act that way, I find myself repeatedly annoyed at how inefficient it is to have to dig for people's real opinions. I have to go through all this rigamarole to signal that it is safe to share their thoughts with me, and that I can handle their criticism.
It makes perfect sense that the Nara would have the culture internally. Shikamaru being brusque to us is signaling that we are in his in-group, and that he trusts us to maturely handle feedback.
Not to mention, all of that sugar-coating your criticism takes spoons that are in short supply for the Nara.
Edit: Yeah he's not downplaying our capabilities. Both of the S-rankers you mention would not hesitate to kill us if Leaf's stability is at stake.
The problem with punching above our weight-class is that we're punched back it's coming from someone much bigger than us.
Hiashi, if he was willing to sacrifice a few people and his reputation, could easily destroy us. He's not the only one who can.