I hope you didn’t mean it that way, but your comment to me reads very insulting, putting communion in air quotes and all. I’ll take it in good faith that you didn’t mean it that way and were sincerely asking. We “have a communion” because Jesus promised that it was His very body and blood given to us for forgiveness of sins:
What is the Sacrament of the Altar?
It is the true body and blood of our Lord Jesus Christ, under the bread and wine, for us Christians to eat and to drink, instituted by Christ Himself.
What is the benefit of such eating and drinking?
That is shown us in these words: Given, and shed for you, for the remission of sins; namely, that in the Sacrament forgiveness of sins, life, and salvation are given us through these words. For where there is forgiveness of sins, there is also life and salvation. - Luther’s Small Catechism. http://bookofconcord.org/smallcatechism.php#sacrament
This is a much more exhaustive treatment in the Large Catechism: http://bookofconcord.org/lc-7-sacrament.php
As to who CAN consecrate the elements - frankly, I don’t know what our official position on that is. Never really had a reason to consider it before. As to who SHOULD, that’s another matter. That should be an ordained pastor, because it is part of his job and calling, and he’s supposed to understand (as much as a human can anyway) what’s going on and be able to instruct and guide those in his pastoral care. Much the same reason that it SHOULD be a pastor who does other pastor-y stuff.
Just who 'consecrates' a Seder meal?