Have we sold out to relevance?

One of the great debates in the church is a concern over selling out the core values of the church for the sake of reaching out to others. I am reading a book which decrees the end of effective Christianity in an age of "Christianity Lite". In some ways I must agree that we have failed to create deep roots into people's lives. Having people in your church does not equate in most cases to deep personal growth and conviction. People seem to come to church for the show or to be seen in a "hip" spot rather than coming to grow in deeper relationship with the Lord. However, I can't agree with the premise that using tools of the culture (movies, songs, etc.) is selling out. We have to be able to dialogue with our fellow men without hiding in a cocoon. We need to make a greater impact yes, but having an aversion to culture is not necessarily the answer.