America needs more evangelical churches. Only six other nations have a total population larger than 80 million. It is unrealistic to think that these people can be evangelized and discipled by existing churches. New churches are needed. Because it is rejuvenating for established churches.
Church planting is a normal and natural function for a church.
If it does not take on this task, it has become root bound. Not that all existing churches are dead, or even that most of them are. Most can and should be brought to life by the power of the Holy Spirit. Still, the most exciting part of the hospital is the maternity ward.