This is the scene that made me fall in love with this movie.
It would have been so easy for them to just make cliche villains and say, "Oh the Rock Trolls hate anything like happiness and friendship, they're the opposite of Pop Trolls in every way." But they didn't.
Instead they gave us a scene that allows us to relate to the Rock Trolls, despite being antagonists in the story, and at the same time show us a vulnerable side of the main antagonist that made her more than just a one-dimensional villain.
And you know what, Barb is right. Friendship DOES take a lot of work, and don't think many people realize that consciously. As a recluse introvert, I've always been very aware of how much time and investment my friendships require. Sometimes you have to do things you don't want to do, or that you need courage to do, because a friend asks for help. Sometimes you need to spend time with friends even if you're tired yourself, because they need someone to listen or to stand by them. Sure, sometimes friendships are spontaneous and spring up in random places, but that doesn't mean you're not putting in the work to keep those friendships and grow them.
TLDR: I love Barb so much, she's right and she should say it.