Here's some links to some articles about preaching.
The first, here, talks about perceived need to hit a six every sermon and the dangers involved in having a wrong view of how preaching works.
Incidentally some time ago (some years ago) I was preaching on a passage and felt I needed some help to know how others tackled it. So I looked at the websites of preachers known for reliably hitting a six every sermon.
And guess what I found.
None of them had ever preached on the passage I had to deal with. Hah !
The second, here, talks about preachers and their critics.
Both are worth a read and reflecting on.