The lack of background characters was another factor in the series' storytelling, there were probably people passing by the key characters; but since the characters serve as narrators in the story we don't see these passersby because the narrator deemed them unimportant to the- https://twitter.com/mosojao_/status/1351257270940794882

story at hand thus not being included in the narration. Character perspective is a key theme in the series so being uninterested due to aspects like this ofc you'd drop it

Might as well talk about the dialogue too

I like to see all the dialogue as a way for you to get familiar with the characters and their personality traits. I always loved these interactions and is one of the most fun things to watch is the way these characters intermingle.