Rambam says that the Chanukah lights are a mitzvah chaviva hi ad meod, or an exceedingly precious or cherished mitzvah (Hilchot Megillah v'Chanukah 4:12).
By taking on the mitzvah of the Menorah precisely as HaShem commanded, Aharon embodied and delivered on the essence of what the Menorah symbolized
Be of the disciples of Aharon, loving peace and pursuing peace, loving mankind and drawing them close to the Torah.โ
From Aharon and the Menorah to the miracle of Chanukah and the rededication of the Holy Temple, we have the Chanukiyah.
Although the mitzvah of lighting the Chanukiyah could be performed through a spouse, partner, or shaliach, it's such a precious and cherished mitzvah that โ like Aharon with the Menorah โ