You are bang on undercover. The speakers that use that approach basically try to belittle and embarrass the listener into acting on the message.
"Here I am giving you this important message right from God's mouth on earth and what are you going to do? How are you going to spend your time? Are you gonna be so stupid as to take up worldly pursuits and worry about mundane things? Wow... you are a piece of crap then and that's how everyone in your congregation will look at you, you ingrate."