I don't go to church to be entertained as such. I go to church to be engaged. There is a difference, and it is important. In the entertainment industry there is a star up front, with an audience who do not actually participate, but watch. The purpose of the entertainment is fun through distraction, or even worse, manipulation and 'bread and circuses'. Entertainment usually provides less space for the imagination, and engages the senses of sight and sound, but usually in an overwhelming manner. And the entertainment industry is slick, without the still, small voice. (See 1Kings 19:13) Some churches attempt to match their worship to this cultural expectation. Funnily enough, their capitulation to culture on this grand scale seems to go unacknowledged, and they are often the churches that accuse other churches of capitulation to the world on sexual ethics!
Traditional liturgy is not entertainment. In comparison to the entertainment industry it might be boring; and maybe that is not a bad thing. It should be engaging though. And it should provide imaginative and emotional space, time to think and respond, and give a means to do so. It should engage all the senses, but in no way overwhelm them. Even the sixth sense should be attended to in the liturgy. And liturgy should have a structure, most certainly not be manipulative, but rather through the structure of the liturgy open up 'space' to encounter God and glimpse the self, and get an intuition that something deeper is going on in our lives and the life of the world.