The author was a little more specific...ie. where is the biblical authority for a priest to pray over the bread and wine to turn it into flesh and blood...Maybe you can adress the actual citations in the article...
You know what's funny - When you compare the Lutheran and Roman Catholic services, there's not all that much difference other than that we Cross ourselves a lot. By ancestry, I'm half-Lutheran and half-Catholic (I know there's really no such thing) although my dad is pretty agnostic and my mother was very devout. My cousin is married to a Lutheran minister so I've been to a few weddings and funerals.
I fell by the wayside from about '68 to '84 but slowly came back to the Church although I can't say I'm really much better than the "bad Catholic" from Walker Percy's "Love in the Ruins."