Comparing Haymitch and Katniss' narrative styles is so funny to me because he's a yapper and she's a gatekeeper. He drops more lore on D12 in the first two chapters of SOTR than she does in the entire trilogy.
Haymitch is like "Yeah, so this person is related to this person who's related to this person and things are this way because of this and this thing actually came from here and this person is actually my best friend and also here's this extra tidbit of random info cause all my lore dropping comes with it's own additional bonus content and all my unnecessary commentary."
And Katniss is over here like "Tf do I care for if y'all know all the lore of District 12? I'm talking about my beautiful husband's beautiful eyelashes."