Analogies create a false sense of meaning. Nothing new is gained other than an isomorphism. There is no logical transfer of new information because the analogy only works if you already understand both concepts. Additionally, analogies may over simplify concepts but usually people are too enamored by the isomorphism to really see it.

Think about this famous analogy: "Life is like a box of chocolates. You never know what you're gonna get."

I clearly know about how life and a box of chocolates can be random at times. This is dead obvious information to the point of pointlessness. Yet in church or in meetings you see people nod their heads in agreement as if something insightful was said. Here's reality: Nothing insightful was said, the person who was comparing life to a box of chocolates is literally mentally retarded.

Analogies are used to manipulate, not to inform.