Besides preachers

Supposedly, there ought to be at least twice as many elders and deacons as preachers. (OK, not all congregations have supervisors and servants, but you get the idea.) But the latter talk more about what they do, share resources, get training, etc. Why’s that? Why is not more written about and offered to those servants besides preachers?

And, while I’m at it, why does the phrase “Christian ministry” refer so often to preaching?

What do you think?