Bikkurim is a fundamental mitzva. Rashi at the very beginning of the Torah notes that one of the ways the world is perpetuated is through this mitzva.
This is probably quite surprising to learn. Why is it so fundamental?
The answer is exceedingly simple: it is a microcosm of the entire corpus of Judaism.
Someone acquires a plot of land; weeds it; ploughs; sows; prunes; weeds some more; reaps; dries; processes… And so on. A phenomenal amount of labour and energy is expended to produce something to eat or sell. This mitzva teaches that credit is not due to the farmer. The first thing that flowers and sprouts is taken to Jerusalem, and given to the Kohanim, and part of the presentation ceremony requires him to say, “Thank You, God, for the land and fruit that you have given me,”.
This illustrates that no matter what mankind’s status is; whatever it took to bring home the daily bread; ultimately everything is sourced from Above.
This incorporates kindness, gratitude, faith and humility. If the world was full of kind, humble, grateful, faithful people; wouldn’t the world be magnificently beautiful? It shouldn’t be so surprising then, that bikkurim is one of the reasons justifying the entire Creation.