If Communion is just a symbol, if nothing is consecrated, then nothing about the consecration would matter much. Or anything else about it.
Food washing is generally understood as just a symbol. That's why it's never been anything remotely like the Eucharist. And in those few cases where foot washing is a part of weekly public worship, it doesn't matter who does it or who receives it (or anything else, for that matter) cuz it's just a symbol. I practice foot washing every morning in the shower.
But for over 1500 years, Christians did not see the Eucharist as just a symbol. They embraced Real Presence with real blessings. The great majority of Christians still do. It is something sacred and thus conSECRATION matters.
If it's essentially nothing, then essentially nothing about it matters. If nothing is present (except a tiny bit f cheap Weber's white bread and Welch's Grape Juice) then not too much reason to be concerned about it or think much of it or rejoice much in it. At least in foot washing, one's feet get rubbed, which can be rather sensual and nice.
My $0.01
Josiah
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