Speaking honestly, I'm mystified that otherwise intelligent people regard with such fear the interdict of someone just sufficiently schooled because he's wearing watered silks, burning incense, ringing bells, waving his arms and speaking in a dead language.
There is even a secular beauty in the Communion celebration for people like you to appreciate.
It can be fine theatre, but so too are watching Jews piously praying at The Wailing Wall, or seeing thousands of Muslims in unison bowing in prayer toward Mecca. But all the outward symbols remain just that: Only theatre, which distracts from Christianity's central truths.
Good thing Catholics don't do that.