It focuses attention, but it's not on God. The attention is on the preacher and his/her wit.It serves the purpose of focusing peoples attention.
Is the theology of King of your heart really that bad? If a believer truly makes Jesus The King of their heart, the rest of those deep theological issues will fall into place.
This whole discussion reminds me of one of my friends who quit going to church. He is a Christian. He goes to small group Bible studies, shows fruit, etc. He just does not like organized church. His most often stated reason is "I just got tired of dealing with those bitter old bastards. They complain about everything and they are in every church around here."
The great sermons are not about the preacher. In fact, Edwards great sermon was read in a monotone voice with him never looking at the audience. He did not want to be a distraction to God's Spirit at work.