While this is of course a Baroque Church, its altar and altar railing comprise a unity and the altar railing is a lovely table set for those who receive the Bread of Life, Our Lord Jesus Christ, and in this lovely Church, it isn't a walk-up window type of fast food receiving, but rather fine dining at a table set with a lovely tablecloth!
From the time I was 14 until I was 19 years old, I worked at an old fashioned Diary Queen Brazier. It did not have indoor dinning. You ordered at a window and you picked up your order at a window.
Compare that "fast food" approach to going to a nice restaurant like Applebees. After you order, you await the meal to be brought to you by servants, I mean, waiters or waitresses.
Jesus is the ultimate Servant at the Last Supper and on Good Friday, He gives us Himself and sacrifices Himself for our salvation. As a servant (waiter)He washes the feet of the apostles, the first priests ordained on Holy Thursday during the Last Supper.
Our current Ordinary Form of receiving Holy Communion is more like the Dairy Queen Brazier than the fine dining at Applebees. We now go to a "Communion Station" as though to a fast food window and we receive as though we are being dispensed the meal or medicine and we move to the next station, the Chalice station. The same thing happens. Fortunately this never took wings but was experimented with, there was a suggestion in the 1970's that the Sacred Species be placed on pedestals so that communicants could "feed themselves" rather than being fed as though they were small children. The pedestal idea was seen as "more adult!"
Receiving Holy Communion from the altar railing and kneeling (or standing) allows for the priest and any delegates to come to the Communicant with our Lord, thus symbolizing Jesus initiative to come to us, to meet us and nourish and sustain us.
At the railing, one waits for the priest to arrive to the communicant and then the communicant can pause briefly after receiving. Nothing is rushed and there isn't perpetual motion. It isn't a fast food experience of going up to a window to "get Jesus" but allowing Jesus in fine dining style to come to us as the Crucified, Risen and Glorious Servant of His people thus setting an example for all.