The Church as a Religious Cushion

I am rereading Jack Miller's Outgrowing the Ingrown Church and came across this quote:

The local church was intended by Jesus to be a gathering of people full of faith--strong in their confidence in Him--not a gathering of religious folk who desperately need reassurance. Perhaps seeking personal comfort is not wrong in itself. But it is desperately wrong when it becomes the primary reason for the existence of the local church. When that happens, the local church is no living fellowship at all, but a retreat center where anxious people draw resources that enable them merely to cope with the pains of life. The church then becomes a religious cushion.

The gospel certainly is therapeutic (in the best sense of the word) and the church is a hospital for sinners who have been broken by the Fall. However, it is supposed to far more than that. God never calls you in unless He also intends to send you out. If the church merely serves as a retreat center for anxious people, then she is not being faithful to her missionary calling.