Related (but not a duplicate of) the old question here inquiring the logical connection between Arba Minim and the holiday of Succot.
My question is in a slightly different vein - if the Arba Minim symbolizes the water libation that took place in the Temple, and is therefore thematically valid for the same timeframe, but not related to the Succah itself (which were to commemorate the divine clouds in the desert after the exodus), why do some prefer/require to fulfill the Mitzvah of Arba Minim in the Succah?