I agree. If Christians don't have "absolute certainty" about the basics of the Faith (the Apostles' Creed, for example, and Biblical moral standards), then they have nothing but a feel-good get-together.
This is true whether what makes one feel good is guitars and handshakes, or Old Slavonic liturgy and silent prayer, or the traditional Anglican prayer book. I sympathize with the author's subjective concerns about how the liturgy affects him personally ... but if that's all it's about, "Does this benefit me aesthetically and psychologically?" then he might as well go to the symphony.
It is not a question of aesthetics driving worship, but rather of reverence driving aesthetics.