I was intrigued by a question on this website about the reason behind the given commandment that a ba'al mum can't approach to bring a offer made of fire and the offer of bread/food of his G-d, and can't enter within the veil, nor approach the altar (see the passage of Leviticus 21:16-23).
Looking for answers and explanations from a historical, practical, spiritual point of view of why a ba'al mum can't enter the santcuary, I stumbled upon one verse of this passage:
אַ֣ךְ אֶל־הַפָּרֹ֜כֶת לֹ֣א יָבֹ֗א וְאֶל־הַמִּזְבֵּ֛חַ לֹ֥א יִגַּ֖שׁ כִּֽי־מ֣וּם בּ֑וֹ וְלֹ֤א יְחַלֵּל֙ אֶת־מִקְדָּשַׁ֔י כִּ֛י אֲנִ֥י יְהוָ֖ה מְקַדְּשָֽׁם
but he shall not enter behind the curtain or come near the altar, for he has a defect. He shall not profane these places sacred to Me, for I the LORD have sanctified them.
I'm not asking how the physical characteristics are involved with the denial of doing this part of service, but rather what the actual profanity is. Is this situation "profane" because of the mum, or because the priest disobeyed a commandment?