From Peter Mead, where you can read his fuller post:
The vast majority of churches rely almost exclusively on a solo preacher. The vast majority of preachers prepare in isolation. Who turned preaching into a solo sport?
Here are six factors that have influenced this situation. None of them make a good case for going solo!
1. Tradition!
2. Solitary Spirituality
3. Clergy-Laity
4. Single Salary
5. Fallen Nature
6. Insecurity –