With assist from Prs. Boerger and Yakimow:
Those who jettison the Lutheran liturgy fall short of and are, in fact, at odds with the spirit of the Lutheran Confessions which evidence a delight in receiving the Church's heritage as gift, rejecting from it only what is sinful or obscuring of the Gospel, and freely shaping her use of that heritage as best suits the needs of the Church at present, always with a mind toward passing it on toward the next generation. "The living heritage and something new." (Intro LW)
From a discussion on the ALPB boards.
The challenge is that Quia, as the LCMS has historically understood it, speaks to the doctrinal content of the Symbols. But does this do justice to what the Symbols confess? They weren't addressed to disembodied heads. The focus on propositional doctrine leads to an ever diminished role for the Symbols as item after item gets swept from "doctrine" to "practice" category, where the practice is regarded as "descriptive" (and hence, dispensable) while the doctrine (continually narrowed down) as "prescriptive." But this deconstruction of the Symbols simply runs counter to their spirit - which is a joyful embrace of all the gifts the Lord has given through His Church through the ages (third article gifts, if you will). It runs counter to say: "I don't HAVE to do that" when the Symbols would lead our response to be: "What a gift that is! How that witnesses to the Lord's mercy and love!"
The Symbols freely confess that private absolution, for example, is of human origin. It is not commanded in the Sacred Scriptures. It is a human ceremony for the application of the Gospel. And yet, our Symbols are adamant that it would be a wicked thing for it to be taken from the Church; they state we retain and encourage its use. Such a wonderful gift for living in the forgiveness of Christ! Or take the observance of Sunday. Luther states clearly enough in the Larger Catechism that it is not commanded to be kept as the "new" Sabbath day by the Apostles or our Lord. Yet, in the same document, he celebrates and rejoices in it and says we ought to keep Sunday as the Lord's Day. Doctrine or practice? Misses the boat, doesn't it? Rather, GIFT - gift born out of the course of the Gospel in the history of Christ's Church and so the response is never: "You can't make me do that" but "even through human custom, the Lord is giving something to delight in!"
Fire away, lads and lassies.