Quote
I never said that human prayer causes the Lord to be present in the Supper, nor did I indicate that anyone should pray to that end.

That's right. You didn't say that. But Satan does. He is ever willing and eager to appeal to man's vanity and pride, "You are so powerful. You are able to summon Christ to your assembly through your prayers." So what starts out as innocent prayers of thanksgiving to God for His great mercy and grace ends up as the horrible Abomination of the Mass.